The original title is: "Next.js 16: Every Change That Actually Matters for Developers"

Short summary

A comprehensive breakdown of every meaningful change in Next.js 16 through 16.3, including Turbopack becoming the stable default bundler, the new 'use cache' directive for explicit caching boundaries, and updateTag/refresh APIs for Server Actions. The article also covers layout deduplication, incremental prefetching, and instant navigations that make Next.js apps feel like SPAs. Code examples illustrate each feature with practical usage patterns.

• •Turbopack replaces Webpack as stable default for dev and production builds
• •New 'use cache' directive makes caching boundaries explicit in code with updateTag/refresh APIs
• •Instant Navigations in 16.3 prefetches reusable route shells for SPA-like navigation

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