The June 29 Turbopack post for Next.js 16.3 named the boring infrastructure that changes daily experience: memory eviction for the dev server, a persistent file cache for builds, an experimental Rust-based React Compiler, and import.meta.glob support.
Why a build cache is the feature
- A persistent cache means a cold CI build reads the previous build's work instead of recompiling the universe; the build time you feel every day is affected, not a synthetic benchmark.
- Memory eviction keeps a long dev session from eating the laptop: the eviction path decides what to drop when the cache grows, instead of your RAM doing it.
- The Rust React Compiler stays experimental, which is the honest label for a tool that rewrites your components; the post keeps it as a preview, not a default.
import.meta.glob is the sleeper: directory-walk imports for big content sets, which is exactly the shape every MDX/docs/content site builds by hand. If your content pipeline is currently a loop over fs.readdir, this one is for you.