diff --git a/docs/config/shared-options.md b/docs/config/shared-options.md
index 592818c13c0126..7742c47b0b83da 100644
--- a/docs/config/shared-options.md
+++ b/docs/config/shared-options.md
@@ -280,11 +280,12 @@ export default defineConfig({
 
 ## css.preprocessorMaxWorkers
 
-- **Experimental:** [Give Feedback](https://github.com/vitejs/vite/discussions/15835)
 - **Type:** `number | true`
-- **Default:** `0` (does not create any workers and run in the main thread)
+- **Default:** `true`
+
+Specifies how many threads CSS preprocessors will run on. `true` means the number of CPUs minus 1. When set to `0`, Vite will not create any workers and run the preprocessors in the main thread.
 
-If this option is set, CSS preprocessors will run in workers when possible. `true` means the number of CPUs minus 1.
+Depending on the preprocessor options, Vite may run the preprocessors on the main thread even if this option is not set to `0`.
 
 ## css.devSourcemap
 
diff --git a/packages/vite/src/node/plugins/css.ts b/packages/vite/src/node/plugins/css.ts
index f3c4d1ec512775..75146c2c3f1459 100644
--- a/packages/vite/src/node/plugins/css.ts
+++ b/packages/vite/src/node/plugins/css.ts
@@ -144,8 +144,7 @@ export interface CSSOptions {
    * If this option is set, preprocessors will run in workers when possible.
    * `true` means the number of CPUs minus 1.
    *
-   * @default 0
-   * @experimental
+   * @default true
    */
   preprocessorMaxWorkers?: number | true
   postcss?:
@@ -199,8 +198,7 @@ export const cssConfigDefaults = Object.freeze({
   transformer: 'postcss',
   // modules
   // preprocessorOptions
-  /** @experimental */
-  preprocessorMaxWorkers: 0,
+  preprocessorMaxWorkers: true,
   // postcss
   /** @experimental */
   devSourcemap: false,