diff --git a/packages/kbn-babel-preset/common_babel_parser_options.js b/packages/kbn-babel-preset/common_babel_parser_options.js
index eec31329d96bec..79c5571798f60f 100644
--- a/packages/kbn-babel-preset/common_babel_parser_options.js
+++ b/packages/kbn-babel-preset/common_babel_parser_options.js
@@ -24,11 +24,11 @@ module.exports = {
   plugins: [
     'asyncGenerators',
     'classProperties',
-    'classPrivateProperties',
-    'classPrivateMethods',
+    // 'classPrivateProperties',
+    // 'classPrivateMethods',
     'dynamicImport',
     'exportDefaultFrom',
-    'exportNamespaceFrom',
+    // 'exportNamespaceFrom',
     'objectRestSpread',
     'throwExpressions',
   ],
diff --git a/packages/kbn-babel-preset/common_preset.js b/packages/kbn-babel-preset/common_preset.js
index 8e2f1d207f3f41..1033c8aa6b91e5 100644
--- a/packages/kbn-babel-preset/common_preset.js
+++ b/packages/kbn-babel-preset/common_preset.js
@@ -35,13 +35,13 @@ const plugins = [
   // Need this since we are using TypeScript 3.7+
   require.resolve('@babel/plugin-proposal-nullish-coalescing-operator'),
 
-  // Proposal is on stage 4 (https://github.com/tc39/proposal-export-ns-from)
-  // Need this since we are using TypeScript 3.8+
-  require.resolve('@babel/plugin-proposal-export-namespace-from'),
+  // // Proposal is on stage 4 (https://github.com/tc39/proposal-export-ns-from)
+  // // Need this since we are using TypeScript 3.8+
+  // require.resolve('@babel/plugin-proposal-export-namespace-from'),
 
-  // Proposal is on stage 4 (https://github.com/tc39/proposal-export-ns-from)
-  // Need this since we are using TypeScript 3.9+
-  require.resolve('@babel/plugin-proposal-private-methods'),
+  // // Proposal is on stage 4 (https://github.com/tc39/proposal-export-ns-from)
+  // // Need this since we are using TypeScript 3.9+
+  // require.resolve('@babel/plugin-proposal-private-methods'),
 ];
 
 module.exports = {
diff --git a/src/core/server/server.ts b/src/core/server/server.ts
index 6ca580083648f8..ef12379c199e8c 100644
--- a/src/core/server/server.ts
+++ b/src/core/server/server.ts
@@ -76,7 +76,7 @@ export class Server {
   private readonly status: StatusService;
   private readonly coreApp: CoreApp;
 
-  #pluginsInitialized?: boolean;
+  private pluginsInitialized?: boolean;
   private coreStart?: InternalCoreStart;
 
   constructor(
@@ -179,7 +179,7 @@ export class Server {
     };
 
     const pluginsSetup = await this.plugins.setup(coreSetup);
-    this.#pluginsInitialized = pluginsSetup.initialized;
+    this.pluginsInitialized = pluginsSetup.initialized;
 
     await this.legacy.setup({
       core: { ...coreSetup, plugins: pluginsSetup, rendering: renderingSetup },
@@ -198,7 +198,7 @@ export class Server {
     const elasticsearchStart = await this.elasticsearch.start();
     const savedObjectsStart = await this.savedObjects.start({
       elasticsearch: elasticsearchStart,
-      pluginsInitialized: this.#pluginsInitialized,
+      pluginsInitialized: this.pluginsInitialized,
     });
     const capabilitiesStart = this.capabilities.start();
     const uiSettingsStart = await this.uiSettings.start();
diff --git a/src/dev/i18n/extractors/code.js b/src/dev/i18n/extractors/code.js
index 71f28a36e6e849..614b886891dfa9 100644
--- a/src/dev/i18n/extractors/code.js
+++ b/src/dev/i18n/extractors/code.js
@@ -72,13 +72,13 @@ export function* extractCodeMessages(buffer, reporter) {
         'typescript',
         'objectRestSpread',
         'classProperties',
-        'classPrivateProperties',
-        'classPrivateMethods',
+        // 'classPrivateProperties',
+        // 'classPrivateMethods',
         'asyncGenerators',
         'dynamicImport',
         'nullishCoalescingOperator',
         'optionalChaining',
-        'exportNamespaceFrom',
+        // 'exportNamespaceFrom',
       ],
     });
   } catch (error) {