diff --git a/.changeset/heavy-numbers-refuse.md b/.changeset/heavy-numbers-refuse.md
new file mode 100644
index 0000000000..c5d9dc6deb
--- /dev/null
+++ b/.changeset/heavy-numbers-refuse.md
@@ -0,0 +1,10 @@
+---
+'@backstage/plugin-api-docs': minor
+'@backstage/plugin-cost-insights': minor
+'@backstage/plugin-gcp-projects': minor
+'@backstage/plugin-gitops-profiles': minor
+'@backstage/plugin-newrelic': minor
+'@backstage/plugin-welcome': minor
+---
+
+**BREAKING CHANGE** Remove deprecated route registrations, meaning that it is no longer enough to only import the plugin in the app and the exported page extension must be used instead.
diff --git a/plugins/api-docs/src/plugin.ts b/plugins/api-docs/src/plugin.ts
index 4956a48f18..bb8395081f 100644
--- a/plugins/api-docs/src/plugin.ts
+++ b/plugins/api-docs/src/plugin.ts
@@ -22,7 +22,6 @@ import {
   createRoutableExtension,
 } from '@backstage/core';
 import { defaultDefinitionWidgets } from './components/ApiDefinitionCard';
-import { ApiExplorerPage as Page } from './components/ApiExplorerPage/ApiExplorerPage';
 import { apiDocsConfigRef } from './config';
 import { createComponentRouteRef, rootRoute } from './routes';
 
@@ -48,9 +47,6 @@ export const apiDocsPlugin = createPlugin({
   externalRoutes: {
     createComponent: createComponentRouteRef,
   },
-  register({ router }) {
-    router.addRoute(rootRoute, Page);
-  },
 });
 
 export const ApiExplorerPage = apiDocsPlugin.provide(
diff --git a/plugins/cost-insights/src/plugin.ts b/plugins/cost-insights/src/plugin.ts
index 29e345532d..aabafade9a 100644
--- a/plugins/cost-insights/src/plugin.ts
+++ b/plugins/cost-insights/src/plugin.ts
@@ -19,9 +19,6 @@ import {
   createRouteRef,
   createRoutableExtension,
 } from '@backstage/core';
-import { CostInsightsPage as CostInsightsPageComponent } from './components/CostInsightsPage';
-import { ProjectGrowthInstructionsPage as ProjectGrowthInstructionsPageComponent } from './components/ProjectGrowthInstructionsPage';
-import { LabelDataflowInstructionsPage as LabelDataflowInstructionsPageComponent } from './components/LabelDataflowInstructionsPage';
 
 export const rootRouteRef = createRouteRef({
   path: '/cost-insights',
@@ -40,16 +37,7 @@ export const unlabeledDataflowAlertRef = createRouteRef({
 
 export const costInsightsPlugin = createPlugin({
   id: 'cost-insights',
-  register({ router, featureFlags }) {
-    router.addRoute(rootRouteRef, CostInsightsPageComponent);
-    router.addRoute(
-      projectGrowthAlertRef,
-      ProjectGrowthInstructionsPageComponent,
-    );
-    router.addRoute(
-      unlabeledDataflowAlertRef,
-      LabelDataflowInstructionsPageComponent,
-    );
+  register({ featureFlags }) {
     featureFlags.register('cost-insights-currencies');
   },
   routes: {
diff --git a/plugins/gcp-projects/src/plugin.ts b/plugins/gcp-projects/src/plugin.ts
index 9126716d55..5280ff8e35 100644
--- a/plugins/gcp-projects/src/plugin.ts
+++ b/plugins/gcp-projects/src/plugin.ts
@@ -21,10 +21,7 @@ import {
   googleAuthApiRef,
 } from '@backstage/core';
 import { gcpApiRef, GcpClient } from './api';
-import { NewProjectPage } from './components/NewProjectPage';
-import { ProjectDetailsPage } from './components/ProjectDetailsPage';
-import { ProjectListPage } from './components/ProjectListPage';
-import { rootRouteRef, projectRouteRef, newProjectRouteRef } from './routes';
+import { rootRouteRef } from './routes';
 
 export const gcpProjectsPlugin = createPlugin({
   id: 'gcp-projects',
@@ -40,11 +37,6 @@ export const gcpProjectsPlugin = createPlugin({
       },
     }),
   ],
-  register({ router }) {
-    router.addRoute(rootRouteRef, ProjectListPage);
-    router.addRoute(projectRouteRef, ProjectDetailsPage);
-    router.addRoute(newProjectRouteRef, NewProjectPage);
-  },
 });
 
 export const GcpProjectsPage = gcpProjectsPlugin.provide(
diff --git a/plugins/gitops-profiles/src/plugin.ts b/plugins/gitops-profiles/src/plugin.ts
index 98a0067969..df19087199 100644
--- a/plugins/gitops-profiles/src/plugin.ts
+++ b/plugins/gitops-profiles/src/plugin.ts
@@ -19,9 +19,6 @@ import {
   createApiFactory,
   createRoutableExtension,
 } from '@backstage/core';
-import ProfileCatalog from './components/ProfileCatalog';
-import ClusterPage from './components/ClusterPage';
-import ClusterList from './components/ClusterList';
 import {
   gitOpsClusterListRoute,
   gitOpsClusterDetailsRoute,
@@ -34,11 +31,6 @@ export const gitopsProfilesPlugin = createPlugin({
   apis: [
     createApiFactory(gitOpsApiRef, new GitOpsRestApi('http://localhost:3008')),
   ],
-  register({ router }) {
-    router.addRoute(gitOpsClusterListRoute, ClusterList);
-    router.addRoute(gitOpsClusterDetailsRoute, ClusterPage);
-    router.addRoute(gitOpsClusterCreateRoute, ProfileCatalog);
-  },
   routes: {
     listPage: gitOpsClusterListRoute,
     detailsPage: gitOpsClusterDetailsRoute,
diff --git a/plugins/newrelic/src/plugin.ts b/plugins/newrelic/src/plugin.ts
index d89aa813e9..a92c051b27 100644
--- a/plugins/newrelic/src/plugin.ts
+++ b/plugins/newrelic/src/plugin.ts
@@ -22,7 +22,6 @@ import {
   createRoutableExtension,
 } from '@backstage/core';
 import { NewRelicClient, newRelicApiRef } from './api';
-import NewRelicComponent from './components/NewRelicComponent';
 
 export const rootRouteRef = createRouteRef({
   path: '/newrelic',
@@ -38,9 +37,6 @@ export const newRelicPlugin = createPlugin({
       factory: ({ discoveryApi }) => new NewRelicClient({ discoveryApi }),
     }),
   ],
-  register({ router }) {
-    router.addRoute(rootRouteRef, NewRelicComponent);
-  },
   routes: {
     root: rootRouteRef,
   },
diff --git a/plugins/welcome/src/plugin.ts b/plugins/welcome/src/plugin.ts
index f950b93874..54a7cd93d1 100644
--- a/plugins/welcome/src/plugin.ts
+++ b/plugins/welcome/src/plugin.ts
@@ -19,7 +19,6 @@ import {
   createRoutableExtension,
   createRouteRef,
 } from '@backstage/core';
-import WelcomePageComponent from './components/WelcomePage';
 
 export const rootRouteRef = createRouteRef({
   title: 'Welcome',
@@ -27,8 +26,7 @@ export const rootRouteRef = createRouteRef({
 
 export const welcomePlugin = createPlugin({
   id: 'welcome',
-  register({ router, featureFlags }) {
-    router.addRoute(rootRouteRef, WelcomePageComponent);
+  register({ featureFlags }) {
     featureFlags.register('enable-welcome-box');
   },
 });