update documentation

Author: lukesandberg

docs/01-app/03-api-reference/05-config/01-next-config-js/turbopackFileSystemCache.mdx

@@ -8,7 +8,7 @@ description: Learn how to enable FileSystem Caching for Turbopack builds
 
 Turbopack FileSystem Cache enables Turbopack to reduce work across `next dev` or `next build` commands. When enabled, Turbopack will save and restore data to the `.next` folder between builds, which can greatly speed up subsequent builds and dev sessions.
 
-> **Good to know:** The FileSystem Cache feature is Beta and is still under development. Users adopting should expect some stability issues. We recommend first adopting it for development.
+> **Good to know:** The FileSystem Cache feature is considered stable for development and experimental for production builds
 
 ```ts filename="next.config.ts" switcher
 import type { NextConfig } from 'next'
@@ -43,5 +43,6 @@ module.exports = nextConfig
 
 | Version   | Changes                                                        |
 | --------- | -------------------------------------------------------------- |
+| `v16.1.0` | FileSystem caching is enabled by default for development       |
 | `v16.0.0` | Beta release with separate flags for build and dev             |
 | `v15.5.0` | Persistent caching released as experimental on canary releases |

packages/next/src/server/config-shared.ts

@@ -422,6 +422,8 @@ export interface ExperimentalConfig {
 
   /**
    * Enable filesystem cache for the turbopack build.
+   *
+   * Defaults to `false`.
    */
   turbopackFileSystemCacheForBuild?: boolean