diff --git a/packages/compat/src/compat-app-builder.ts b/packages/compat/src/compat-app-builder.ts
index 978411314..515192d79 100644
--- a/packages/compat/src/compat-app-builder.ts
+++ b/packages/compat/src/compat-app-builder.ts
@@ -488,7 +488,6 @@ export class CompatAppBuilder {
     this.addResolverConfig(resolverConfig);
     this.addContentForConfig(contentForConfig);
     this.addEmberEnvConfig(config.EmberENV);
-    this.addAppBoot(this.compatApp.appBoot.readAppBoot());
     this.outputAppBootError(config.modulePrefix, config.APP, contentForConfig);
     let babelConfig = await this.babelConfig(resolverConfig);
     this.addBabelConfig(babelConfig);
@@ -602,10 +601,6 @@ export class CompatAppBuilder {
     });
   }
 
-  private addAppBoot(appBoot?: string) {
-    writeFileSync(join(locateEmbroiderWorkingDir(this.compatApp.root), 'ember-app-boot.js'), appBoot ?? '');
-  }
-
   // Classic addons providing custom content-for "app-boot" is no longer supported.
   // The purpose of this error message is to help developers to move the classic addons code.
   // Developers can deactivate it with useAddonAppBoot build option.
diff --git a/packages/compat/src/compat-app.ts b/packages/compat/src/compat-app.ts
index 84c9f64af..963df0d97 100644
--- a/packages/compat/src/compat-app.ts
+++ b/packages/compat/src/compat-app.ts
@@ -12,7 +12,6 @@ import { WatchedDir } from 'broccoli-source';
 import resolve from 'resolve';
 import ContentForConfig from './content-for-config';
 import { V1Config } from './v1-config';
-import { WriteV1AppBoot, ReadV1AppBoot } from './v1-appboot';
 import type { AddonMeta, EmberAppInstance, OutputFileToInputFileMap, PackageInfo } from '@embroider/core';
 import { writeJSONSync, ensureDirSync, copySync, pathExistsSync, existsSync, writeFileSync } from 'fs-extra';
 import AddToTree from './add-to-tree';
@@ -164,22 +163,6 @@ export default class CompatApp {
     return this.legacyEmberAppInstance.options.autoRun;
   }
 
-  @Memoize()
-  get appBoot(): ReadV1AppBoot {
-    let env = this.legacyEmberAppInstance.env;
-    let appBootContentTree = new WriteV1AppBoot();
-
-    let patterns = this.configReplacePatterns;
-
-    appBootContentTree = new this.configReplace(appBootContentTree, this.configTree, {
-      configPath: join('environments', `${env}.json`),
-      files: ['config/app-boot.js'],
-      patterns,
-    });
-
-    return new ReadV1AppBoot(appBootContentTree);
-  }
-
   private get storeConfigInMeta(): boolean {
     return this.legacyEmberAppInstance.options.storeConfigInMeta;
   }
@@ -747,7 +730,6 @@ export default class CompatApp {
       publicTree,
       configTree,
       contentForTree,
-      appBootTree: this.appBoot,
       prevStageTree,
     };
   }
diff --git a/packages/compat/src/v1-appboot.ts b/packages/compat/src/v1-appboot.ts
deleted file mode 100644
index 1ae5a42a2..000000000
--- a/packages/compat/src/v1-appboot.ts
+++ /dev/null
@@ -1,44 +0,0 @@
-import Plugin from 'broccoli-plugin';
-import type { Node } from 'broccoli-node-api';
-import { join } from 'path';
-import { readFileSync, outputFileSync } from 'fs-extra';
-
-export class WriteV1AppBoot extends Plugin {
-  private lastContents: string | undefined;
-  constructor() {
-    super([], {
-      persistentOutput: true,
-      needsCache: false,
-    });
-  }
-  build() {
-    let filename = join(this.outputPath, 'config/app-boot.js');
-    let contents = `{{content-for "app-boot"}}`;
-    if (!this.lastContents || this.lastContents !== contents) {
-      outputFileSync(filename, contents);
-    }
-    this.lastContents = contents;
-  }
-}
-
-export class ReadV1AppBoot extends Plugin {
-  private appBoot: string | undefined;
-  private hasBuilt = false;
-  constructor(appBootTree: Node) {
-    super([appBootTree], {
-      persistentOutput: true,
-      needsCache: false,
-    });
-  }
-  build() {
-    this.appBoot = readFileSync(join(this.inputPaths[0], `config/app-boot.js`), 'utf8');
-    this.hasBuilt = true;
-  }
-
-  readAppBoot() {
-    if (!this.hasBuilt) {
-      throw new Error(`AppBoot not available until after the build`);
-    }
-    return this.appBoot;
-  }
-}