Next.js 16 opens a new chapter in the React ecosystem with App Router, Turbopack, Server Components, and new file conventions.
Turbopack is now the default bundler. Dev server starts 5-10x faster.
File-based metadata like app/manifest.ts, app/icon.tsx, app/apple-icon.tsx make SEO and PWA setup much simpler.
A release with real performance gains, less configuration and better DX for large projects.