What problem does it solve? Next.js 16 replaces legacy caching APIs like experimental.ppr, unstable_cache, and route segment config with Cache Components, and developers need clear guidance on enabling Partial Prerendering, applying the use cache directive correctly, and invalidating cached data without runtime errors. ## Core Features & Use Cases - Partial Prerendering Setup: Enable cacheComponents in next.config.ts and mix static, cached, and dynamic content in a single route using Suspense boundaries. - Cache Lifetime and Tagging: Configure cacheLife profiles (minutes, hours, days) or inline stale/revalidate/expire values, and tag entries with cacheTag for targeted invalidation via updateTag or revalidateTag. - Migration Guidance: Convert unstable_cache calls, force-dynamic flags, and revalidate exports to the use cache directive with automatic cache key generation. - Use Case: When building a dashboard that mixes a static shell, hourly-refreshed stats, and per-user notifications, apply use cache with cacheLife('hours') to the stats component and wrap the dynamic notifications in Suspense. ## Quick Start Enable cacheComponents in my Next.js 16 config and refactor my page to use the use cache directive with cacheLife and cacheTag for cached data fetching.