diff --git a/dev-packages/e2e-tests/test-applications/remix-hydrogen/app/entry.client.tsx b/dev-packages/e2e-tests/test-applications/remix-hydrogen/app/entry.client.tsx
index 0008ebe5c7c8..6b9287e6f709 100644
--- a/dev-packages/e2e-tests/test-applications/remix-hydrogen/app/entry.client.tsx
+++ b/dev-packages/e2e-tests/test-applications/remix-hydrogen/app/entry.client.tsx
@@ -5,7 +5,6 @@ import { useEffect } from 'react';
 import { hydrateRoot } from 'react-dom/client';
 
 Sentry.init({
-  traceLifecycle: 'static',
   environment: 'qa', // dynamic sampling bias to keep transactions
   // Could not find a working way to set the DSN in the browser side from the environment variables
   dsn: 'https://public@dsn.ingest.sentry.io/1337',
diff --git a/dev-packages/e2e-tests/test-applications/remix-hydrogen/app/functions/_middleware.ts b/dev-packages/e2e-tests/test-applications/remix-hydrogen/app/functions/_middleware.ts
index 1b096dfe162b..da0554ba8e56 100644
--- a/dev-packages/e2e-tests/test-applications/remix-hydrogen/app/functions/_middleware.ts
+++ b/dev-packages/e2e-tests/test-applications/remix-hydrogen/app/functions/_middleware.ts
@@ -9,7 +9,6 @@ import * as build from '../build/server';
 export const onRequest = [
   (context: EventPluginContext<any, any, any, any>) =>
     sentryPagesPlugin({
-      traceLifecycle: 'static',
       dsn: context.env.E2E_TEST_DSN,
       tracesSampleRate: 1.0,
     })(context),
diff --git a/dev-packages/e2e-tests/test-applications/remix-hydrogen/server.ts b/dev-packages/e2e-tests/test-applications/remix-hydrogen/server.ts
index 0423e657d2bb..372e584e0a9e 100644
--- a/dev-packages/e2e-tests/test-applications/remix-hydrogen/server.ts
+++ b/dev-packages/e2e-tests/test-applications/remix-hydrogen/server.ts
@@ -36,7 +36,6 @@ export default {
     return wrapRequestHandler(
       {
         options: {
-          traceLifecycle: 'static',
           environment: 'qa', // dynamic sampling bias to keep transactions
           dsn: 'https://public@dsn.ingest.sentry.io/1337',
           tracesSampleRate: 1.0,
diff --git a/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/client-errors.test.ts b/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/client-errors.test.ts
index 531bfd82f3f0..927583a4d6a8 100644
--- a/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/client-errors.test.ts
+++ b/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/client-errors.test.ts
@@ -1,12 +1,12 @@
 import { expect, test } from '@playwright/test';
-import { waitForError, waitForTransaction } from '@sentry-internal/test-utils';
+import { getSpanOp, waitForError, waitForStreamedSpan } from '@sentry-internal/test-utils';
 
 test('Sends a client-side exception to Sentry', async ({ page }) => {
-  // The pageload transaction only completes once the client SDK and Remix have hydrated.
+  // The pageload span only completes once the client SDK and Remix have hydrated.
   // Awaiting it before clicking guarantees the button's onClick handler is attached — a click
   // that lands before hydration would do nothing, and the exception would never be captured.
-  const pageloadTransactionPromise = waitForTransaction('remix-hydrogen', transactionEvent => {
-    return transactionEvent.contexts?.trace?.op === 'pageload' && transactionEvent.transaction === '/';
+  const pageloadSpanPromise = waitForStreamedSpan('remix-hydrogen', span => {
+    return getSpanOp(span) === 'pageload' && span.is_segment && span.name === '/';
   });
 
   const errorPromise = waitForError('remix-hydrogen', errorEvent => {
@@ -15,7 +15,7 @@ test('Sends a client-side exception to Sentry', async ({ page }) => {
 
   await page.goto('/');
 
-  await pageloadTransactionPromise;
+  await pageloadSpanPromise;
 
   const exceptionButton = page.locator('id=exception-button');
   await exceptionButton.click();
diff --git a/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/client-transactions.test.ts b/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/client-transactions.test.ts
index 776abb4fa806..a2fec8ea9d6a 100644
--- a/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/client-transactions.test.ts
+++ b/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/client-transactions.test.ts
@@ -1,67 +1,50 @@
 import { expect, test } from '@playwright/test';
-import { waitForTransaction } from '@sentry-internal/test-utils';
+import { getSpanOp, waitForStreamedSpan } from '@sentry-internal/test-utils';
 
-test('Sends a pageload transaction to Sentry', async ({ page }) => {
-  const transactionPromise = waitForTransaction('remix-hydrogen', transactionEvent => {
-    return transactionEvent.contexts?.trace?.op === 'pageload' && transactionEvent.transaction === '/';
+test('Sends a pageload span to Sentry', async ({ page }) => {
+  const spanPromise = waitForStreamedSpan('remix-hydrogen', span => {
+    return getSpanOp(span) === 'pageload' && span.is_segment && span.name === '/';
   });
 
   await page.goto('/');
 
-  const transactionEvent = await transactionPromise;
-
-  expect(transactionEvent).toBeDefined();
-  expect(transactionEvent).toMatchObject({
-    transaction: '/',
-    contexts: {
-      trace: {
-        data: {
-          'sentry.segment.name.source': 'route',
-          'url.full': expect.stringMatching(/^https?:\/\/localhost:\d+\/$/),
-          'url.path': '/',
-          'url.template': '/',
-        },
-      },
-    },
+  const span = await spanPromise;
+
+  expect(span.attributes).toMatchObject({
+    'sentry.segment.name.source': { value: 'route', type: 'string' },
+    'url.full': { value: expect.stringMatching(/^https?:\/\/localhost:\d+\/$/), type: 'string' },
+    'url.path': { value: '/', type: 'string' },
+    'url.template': { value: '/', type: 'string' },
   });
 });
 
-test('Sends a navigation transaction to Sentry', async ({ page }) => {
-  // Wait for the initial pageload transaction first. This ensures the client SDK and
-  // Remix router are fully hydrated before we click the link. Clicking before hydration
-  // completes makes the `<Link>` behave like a plain anchor, triggering a full page
-  // navigation (a `pageload` transaction) instead of a client-side `navigation` one,
-  // which makes this test flaky.
-  const pageloadTransactionPromise = waitForTransaction('remix-hydrogen', transactionEvent => {
-    return transactionEvent.contexts?.trace?.op === 'pageload' && transactionEvent.transaction === '/';
+test('Sends a navigation span to Sentry', async ({ page }) => {
+  // Wait for the initial pageload span first. This ensures the client SDK and Remix router are
+  // fully hydrated before we click the link. Clicking before hydration completes makes the `<Link>`
+  // behave like a plain anchor, triggering a full page navigation (a `pageload` span) instead of a
+  // client-side `navigation` one, which makes this test flaky.
+  const pageloadSpanPromise = waitForStreamedSpan('remix-hydrogen', span => {
+    return getSpanOp(span) === 'pageload' && span.is_segment && span.name === '/';
   });
 
-  const transactionPromise = waitForTransaction('remix-hydrogen', transactionEvent => {
-    return transactionEvent.contexts?.trace?.op === 'navigation' && transactionEvent.transaction === '/user/:id';
+  const spanPromise = waitForStreamedSpan('remix-hydrogen', span => {
+    return getSpanOp(span) === 'navigation' && span.is_segment && span.name === '/user/:id';
   });
 
   await page.goto('/');
 
-  await pageloadTransactionPromise;
+  await pageloadSpanPromise;
 
   const linkElement = page.locator('id=navigation');
   await linkElement.click();
 
-  const transactionEvent = await transactionPromise;
-
-  expect(transactionEvent).toBeDefined();
-  expect(transactionEvent).toMatchObject({
-    transaction: '/user/:id',
-    contexts: {
-      trace: {
-        data: {
-          'sentry.segment.name.source': 'route',
-          'url.full': expect.stringMatching(/^https?:\/\/localhost:\d+\/user\/5$/),
-          'url.path': '/user/5',
-          'url.template': '/user/:id',
-        },
-      },
-    },
+  const span = await spanPromise;
+
+  expect(span.attributes).toMatchObject({
+    'sentry.segment.name.source': { value: 'route', type: 'string' },
+    'url.full': { value: expect.stringMatching(/^https?:\/\/localhost:\d+\/user\/5$/), type: 'string' },
+    'url.path': { value: '/user/5', type: 'string' },
+    'url.template': { value: '/user/:id', type: 'string' },
   });
 });
 
diff --git a/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/server-transactions.test.ts b/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/server-transactions.test.ts
index b6f17bc18c37..4d66b5463e3c 100644
--- a/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/server-transactions.test.ts
+++ b/dev-packages/e2e-tests/test-applications/remix-hydrogen/tests/server-transactions.test.ts
@@ -1,53 +1,48 @@
 import { expect, test } from '@playwright/test';
-import { waitForTransaction } from '@sentry-internal/test-utils';
+import type { SerializedStreamedSpan } from '@sentry-internal/test-utils';
+import { getSpanOp, waitForStreamedSpan, waitForStreamedSpans } from '@sentry-internal/test-utils';
+
+const APP_NAME = 'remix-hydrogen';
 
 test.describe.configure({ mode: 'serial' });
 
-test('Sends parameterized transaction name to Sentry', async ({ page }) => {
-  const transactionPromise = waitForTransaction('remix-hydrogen', transactionEvent => {
-    return transactionEvent.contexts?.trace?.op === 'http.server';
+test('Sends a parameterized span name to Sentry', async ({ page }) => {
+  const spanPromise = waitForStreamedSpan(APP_NAME, span => {
+    // The span name is parameterized (route pattern, not the actual URL).
+    return getSpanOp(span) === 'http.server' && span.is_segment && span.name === 'GET /user/:id';
   });
 
   await page.goto('/user/123');
 
-  const transaction = await transactionPromise;
+  const span = await spanPromise;
 
-  expect(transaction).toBeDefined();
-  expect(transaction.transaction).toBe('GET /user/:id');
+  expect(span.attributes['sentry.segment.name.source']?.value).toBe('route');
 });
 
-test('Sends two linked transactions (server & client) to Sentry', async ({ page }) => {
-  // We use this to identify the transactions
-  const testTag = crypto.randomUUID();
-
-  const httpServerTransactionPromise = waitForTransaction('remix-hydrogen', transactionEvent => {
-    return transactionEvent.contexts?.trace?.op === 'http.server' && transactionEvent.tags?.['sentry_test'] === testTag;
-  });
-
-  const pageLoadTransactionPromise = waitForTransaction('remix-hydrogen', transactionEvent => {
-    return transactionEvent.contexts?.trace?.op === 'pageload' && transactionEvent.tags?.['sentry_test'] === testTag;
+test('Sends two linked spans (server & client) to Sentry', async ({ page }) => {
+  // Streamed spans are buffered before they flush, so spans from an earlier page load can still be
+  // arriving here. The document advertises its own trace in the `sentry-trace` meta tag, so that is
+  // what tells this page load's spans apart rather than the op or the URL.
+  const streamedSpans: SerializedStreamedSpan[] = [];
+  void waitForStreamedSpans(APP_NAME, spans => {
+    streamedSpans.push(...spans);
+    return false;
   });
 
-  page.goto(`/?tag=${testTag}`);
-
-  const pageloadTransaction = await pageLoadTransactionPromise;
-  const httpServerTransaction = await httpServerTransactionPromise;
-
-  expect(pageloadTransaction).toBeDefined();
-  expect(httpServerTransaction).toBeDefined();
-
-  const httpServerTraceId = httpServerTransaction.contexts?.trace?.trace_id;
-  const httpServerSpanId = httpServerTransaction.contexts?.trace?.span_id;
-
-  const pageLoadTraceId = pageloadTransaction.contexts?.trace?.trace_id;
-  const pageLoadSpanId = pageloadTransaction.contexts?.trace?.span_id;
+  await page.goto('/');
 
-  expect(httpServerTransaction.transaction).toBe('GET /');
-  expect(pageloadTransaction.transaction).toBe('/');
+  const sentryTrace = await page.getAttribute('meta[name="sentry-trace"]', 'content');
+  const [traceId] = (sentryTrace ?? '').split('-');
+  expect(traceId).toMatch(/^[a-f0-9]{32}$/);
 
-  expect(httpServerTraceId).toBeDefined();
-  expect(httpServerSpanId).toBeDefined();
+  const findServerSegmentSpan = () =>
+    streamedSpans.find(span => getSpanOp(span) === 'http.server' && span.is_segment && span.trace_id === traceId);
+  await expect.poll(findServerSegmentSpan).toBeDefined();
+  expect(findServerSegmentSpan()!.name).toBe('GET /');
 
-  expect(pageLoadTraceId).toEqual(httpServerTraceId);
-  expect(pageLoadSpanId).not.toEqual(httpServerSpanId);
+  const findPageloadSpan = () =>
+    streamedSpans.find(span => getSpanOp(span) === 'pageload' && span.is_segment && span.trace_id === traceId);
+  await expect.poll(findPageloadSpan).toBeDefined();
+  expect(findPageloadSpan()!.name).toBe('/');
+  expect(findPageloadSpan()!.span_id).not.toBe(findServerSegmentSpan()!.span_id);
 });