The Turbopack updates in Next.js 16.2 are about shrinking feedback loops. Server Fast Refresh is particularly valuable because App Router work crosses the server/client boundary constantly. If server-side edits require slow reloads, teams naturally avoid touching the places that need the most care.
Subresource integrity support and dynamic import tree shaking are also signs that Turbopack is maturing beyond local speed. A bundler has to serve development, production correctness, security posture, and bundle hygiene.
For teams evaluating Turbopack, the right question is no longer only "is it faster?" It is:
- Does it preserve correctness across our Server Components and route handlers?
- Does it improve local iteration enough to change developer behavior?
- Does production output remain inspectable and secure?
- Do edge cases with workers, WASM, or dynamic imports behave as expected?
The update suggests Turbopack is becoming less of an experiment and more of the expected Next.js path. That makes migration testing worth prioritizing.
Official source: Turbopack: What's New in Next.js 16.2.