diff --git a/packages/docusaurus-types/src/index.d.ts b/packages/docusaurus-types/src/index.d.ts
index 5e9e043ef0..a33d8c5e81 100644
--- a/packages/docusaurus-types/src/index.d.ts
+++ b/packages/docusaurus-types/src/index.d.ts
@@ -392,18 +392,6 @@ export interface ConfigureWebpackUtils {
     isServer: boolean;
     babelOptions?: Record<string, unknown>;
   }) => RuleSetRule;
-
-  // TODO deprecated: remove before end of 2021?
-  getCacheLoader: (
-    isServer: boolean,
-    cacheOptions?: Record<string, unknown>,
-  ) => RuleSetRule | null;
-
-  // TODO deprecated: remove before end of 2021?
-  getBabelLoader: (
-    isServer: boolean,
-    options?: Record<string, unknown>,
-  ) => RuleSetRule;
 }
 
 interface HtmlTagObject {
diff --git a/packages/docusaurus-utils-validation/src/index.ts b/packages/docusaurus-utils-validation/src/index.ts
index 0462958250..40924a6da0 100644
--- a/packages/docusaurus-utils-validation/src/index.ts
+++ b/packages/docusaurus-utils-validation/src/index.ts
@@ -10,8 +10,6 @@ export {default as Joi} from './Joi';
 export {JoiFrontMatter} from './JoiFrontMatter';
 
 export {
-  isValidationDisabledEscapeHatch,
-  logValidationBugReportHint,
   printWarning,
   normalizePluginOptions,
   normalizeThemeConfig,
diff --git a/packages/docusaurus-utils-validation/src/validationUtils.ts b/packages/docusaurus-utils-validation/src/validationUtils.ts
index afc6c2c219..fe47815f0c 100644
--- a/packages/docusaurus-utils-validation/src/validationUtils.ts
+++ b/packages/docusaurus-utils-validation/src/validationUtils.ts
@@ -9,26 +9,6 @@ import type Joi from './Joi';
 import logger from '@docusaurus/logger';
 import {PluginIdSchema} from './validationSchemas';
 
-// TODO temporary escape hatch for alpha-60: to be removed soon
-// Our validation schemas might be buggy at first
-// will permit users to bypass validation until we fix all validation errors
-// see for example: https://github.com/facebook/docusaurus/pull/3120
-// Undocumented on purpose, as we don't want users to keep using it over time
-// Maybe we'll make this escape hatch official some day, with a better api?
-export const isValidationDisabledEscapeHatch =
-  process.env.DISABLE_DOCUSAURUS_VALIDATION === 'true';
-
-if (isValidationDisabledEscapeHatch) {
-  logger.error`You should avoid using code=${'DISABLE_DOCUSAURUS_VALIDATION'} escape hatch, this will be removed.`;
-}
-
-export const logValidationBugReportHint = (): void => {
-  logger.error('A validation error occurred.');
-  logger.info(`The validation system was added recently to Docusaurus as an attempt to avoid user configuration errors.
-We may have made some mistakes.
-If you think your configuration is valid and should keep working, please open a bug report.`);
-};
-
 export function printWarning(warning?: Joi.ValidationError): void {
   if (warning) {
     const warningMessages = warning.details
@@ -54,11 +34,6 @@ export function normalizePluginOptions<T extends {id?: string}>(
   printWarning(warning);
 
   if (error) {
-    logValidationBugReportHint();
-    if (isValidationDisabledEscapeHatch) {
-      logger.error(error);
-      return options as T;
-    }
     throw error;
   }
 
@@ -81,11 +56,6 @@ export function normalizeThemeConfig<T>(
   printWarning(warning);
 
   if (error) {
-    logValidationBugReportHint();
-    if (isValidationDisabledEscapeHatch) {
-      logger.error(error);
-      return themeConfig as T;
-    }
     throw error;
   }
   return value!; // TODO remove this ! in TS 4.6
@@ -108,8 +78,6 @@ export function validateFrontMatter<T>(
     const errorDetails = error.details;
     const invalidFields = errorDetails.map(({path}) => path).join(', ');
 
-    logValidationBugReportHint();
-
     logger.error`The following front matter:
 ${logger.yellow(frontMatterString)}
 contains invalid values for field(s): ${logger.yellow(invalidFields)}.
diff --git a/packages/docusaurus/src/server/configValidation.ts b/packages/docusaurus/src/server/configValidation.ts
index badf154872..fc2007d8f9 100644
--- a/packages/docusaurus/src/server/configValidation.ts
+++ b/packages/docusaurus/src/server/configValidation.ts
@@ -5,16 +5,9 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import logger from '@docusaurus/logger';
 import type {DocusaurusConfig, I18nConfig} from '@docusaurus/types';
 import {DEFAULT_CONFIG_FILE_NAME, STATIC_DIR_NAME} from '@docusaurus/utils';
-import {
-  Joi,
-  logValidationBugReportHint,
-  isValidationDisabledEscapeHatch,
-  URISchema,
-  printWarning,
-} from '@docusaurus/utils-validation';
+import {Joi, URISchema, printWarning} from '@docusaurus/utils-validation';
 
 const DEFAULT_I18N_LOCALE = 'en';
 
@@ -218,12 +211,6 @@ export function validateConfig(
   printWarning(warning);
 
   if (error) {
-    logValidationBugReportHint();
-    if (isValidationDisabledEscapeHatch) {
-      logger.error(error.message);
-      return config as DocusaurusConfig;
-    }
-
     const unknownFields = error.details.reduce((formattedError, err) => {
       if (err.type === 'object.unknown') {
         return `${formattedError}"${err.path}",`;
diff --git a/packages/docusaurus/src/webpack/utils.ts b/packages/docusaurus/src/webpack/utils.ts
index 5c17c05522..2e3f868e6f 100644
--- a/packages/docusaurus/src/webpack/utils.ts
+++ b/packages/docusaurus/src/webpack/utils.ts
@@ -31,7 +31,6 @@ import type {
   ConfigureWebpackUtils,
 } from '@docusaurus/types';
 import {BABEL_CONFIG_FILE_NAME} from '@docusaurus/utils';
-import _ from 'lodash';
 
 // Utility method to get style loaders
 export function getStyleLoaders(
@@ -163,27 +162,6 @@ export const getCustomizableJSLoader =
       ? getDefaultBabelLoader({isServer, babelOptions})
       : jsLoader(isServer);
 
-// TODO remove this before end of 2021?
-const warnBabelLoaderOnce = _.memoize(() => {
-  logger.warn`Docusaurus plans to support multiple JS loader strategies (Babel, esbuild...): code=${'getBabelLoader(isServer)'} is now deprecated in favor of code=${'getJSLoader(isServer)'}.`;
-});
-const getBabelLoaderDeprecated = function getBabelLoaderDeprecated(
-  isServer: boolean,
-  babelOptions?: TransformOptions | string,
-) {
-  warnBabelLoaderOnce();
-  return getDefaultBabelLoader({isServer, babelOptions});
-};
-
-// TODO remove this before end of 2021 ?
-const warnCacheLoaderOnce = _.memoize(() => {
-  logger.warn`Docusaurus uses Webpack 5 and code=${'getCacheLoader()'} usage is now deprecated.`;
-});
-function getCacheLoaderDeprecated() {
-  warnCacheLoaderOnce();
-  return null;
-}
-
 /**
  * Helper function to modify webpack config
  * @param configureWebpack a webpack config or a function to modify config
@@ -204,8 +182,6 @@ export function applyConfigureWebpack(
   const utils: ConfigureWebpackUtils = {
     getStyleLoaders,
     getJSLoader: getCustomizableJSLoader(jsLoader),
-    getBabelLoader: getBabelLoaderDeprecated,
-    getCacheLoader: getCacheLoaderDeprecated,
   };
   if (typeof configureWebpack === 'function') {
     const {mergeStrategy, ...res} = configureWebpack(
diff --git a/website/docs/api/plugin-methods/lifecycle-apis.md b/website/docs/api/plugin-methods/lifecycle-apis.md
index e4cb3d211e..b25455eed3 100644
--- a/website/docs/api/plugin-methods/lifecycle-apis.md
+++ b/website/docs/api/plugin-methods/lifecycle-apis.md
@@ -188,13 +188,13 @@ module.exports = function (context, options) {
     name: 'custom-docusaurus-plugin',
     // highlight-start
     configureWebpack(config, isServer, utils) {
-      const {getCacheLoader} = utils;
+      const {getJSLoader} = utils;
       return {
         module: {
           rules: [
             {
               test: /\.foo$/,
-              use: [getCacheLoader(isServer), 'my-custom-webpack-loader'],
+              use: [getJSLoader(isServer), 'my-custom-webpack-loader'],
             },
           ],
         },
diff --git a/website/versioned_docs/version-2.0.0-beta.14/api/plugin-methods/lifecycle-apis.md b/website/versioned_docs/version-2.0.0-beta.14/api/plugin-methods/lifecycle-apis.md
index dc088d480c..eb69c098d1 100644
--- a/website/versioned_docs/version-2.0.0-beta.14/api/plugin-methods/lifecycle-apis.md
+++ b/website/versioned_docs/version-2.0.0-beta.14/api/plugin-methods/lifecycle-apis.md
@@ -182,13 +182,13 @@ module.exports = function (context, options) {
     name: 'custom-docusaurus-plugin',
     // highlight-start
     configureWebpack(config, isServer, utils) {
-      const {getCacheLoader} = utils;
+      const {getJSLoader} = utils;
       return {
         module: {
           rules: [
             {
               test: /\.foo$/,
-              use: [getCacheLoader(isServer), 'my-custom-webpack-loader'],
+              use: [getJSLoader(isServer), 'my-custom-webpack-loader'],
             },
           ],
         },
diff --git a/website/versioned_docs/version-2.0.0-beta.15/api/plugin-methods/lifecycle-apis.md b/website/versioned_docs/version-2.0.0-beta.15/api/plugin-methods/lifecycle-apis.md
index e4cb3d211e..b25455eed3 100644
--- a/website/versioned_docs/version-2.0.0-beta.15/api/plugin-methods/lifecycle-apis.md
+++ b/website/versioned_docs/version-2.0.0-beta.15/api/plugin-methods/lifecycle-apis.md
@@ -188,13 +188,13 @@ module.exports = function (context, options) {
     name: 'custom-docusaurus-plugin',
     // highlight-start
     configureWebpack(config, isServer, utils) {
-      const {getCacheLoader} = utils;
+      const {getJSLoader} = utils;
       return {
         module: {
           rules: [
             {
               test: /\.foo$/,
-              use: [getCacheLoader(isServer), 'my-custom-webpack-loader'],
+              use: [getJSLoader(isServer), 'my-custom-webpack-loader'],
             },
           ],
         },