What new update in React 19v?

Stable Server Components (RSC): Allows components to run on the server by default. New use() API: Allows directly awaiting promises inside components. React 19 introduces Server Actions: Forms can call server functions without creating separate API routes. useFormStatus() – track pending form submissions useFormState() – manage form state easily Better Hydration & Streaming: Smarter hydration error handling, Better streaming performance, More efficient rendering of async content