Next.js 15 has shifted its approach to caching by defaulting to un-cached fetch requests, aiming to avoid stale data and unexpected caching issues. This change is complemented by the introduction of the dynamicIO API, which provides developers with more explicit control over caching strategies through features like `use cache`, `cacheTag`, and `cacheLife`. The update, available in the canary version, allows for selective caching at the page, component, and API response levels, facilitating dynamic data fetching while maintaining performance. This new paradigm is designed to simplify rendering and caching, offering a more flexible and developer-friendly approach compared to the previous default caching behavior. To demonstrate the use of these new tools, the text describes setting up a Strapi 5 backend API layer and using it with Next.js to manage and serve content efficiently. The text also highlights the importance of balancing dynamic and static data fetching using Suspense in React and outlines methods for revalidating cached data, emphasizing the benefits of the new caching model in building scalable and efficient applications.