fix(nuxt)!: enable payload extraction only for nuxi generate

packages/nuxi/src/commands/build.ts

@@ -27,6 +27,11 @@ export default defineNuxtCommand({
         cwd: rootDir,
         fileName: args.dotenv
       },
+      defaults: {
+        experimental: {
+          payloadExtraction: args.prerender ? true : undefined
+        }
+      },
       overrides: {
         _generate: args.prerender
       }

packages/schema/src/config/experimental.ts

@@ -77,7 +77,15 @@ export default defineUntypedSchema({
     /**
      * When this option is enabled (by default) payload of pages generated with `nuxt generate` are extracted
      */
-    payloadExtraction: true,
+    payloadExtraction: {
+      async $resolve(enabled, get) {
+        enabled = enabled ?? false
+        if (enabled) {
+          console.warn('Using experimental payload extraction for full-static output. You can opt-out by setting `experimental.payloadExtraction` to `false`.')
+        }
+        return enabled
+      }
+    },
 
     /** Enable cross-origin prefetch using the Speculation Rules API. */
     crossOriginPrefetch: false,