The Aggressive Caching Dilemma When migrating to the Next.js App Router, the most jarring experience for developers is how aggressively the framework caches data. In a traditional React Single Page Application (SPA), data is fetched fresh on almost every page load. In Next.js, fetch requests are cached on the server by default. This creates a massive UX problem in B2B SaaS. If a user updates their company's billing address in their settings panel and navigates back to the dashboard, the dashboard will often still display the old address. To the user, it looks like your "Save" button is broken. The immediate reflex for many developers is to opt out of caching entirely using no-store , which completely ruins the blazing-fast SSR performance Next.js was designed for. The Solution: On-Demand Revalidation with Cache Tags At Smart Tech Devs, we never disable the cache. Instead, we architect precise cache invalidation. Next.js allows you to tag specific fetch requests.…