Next.js 15 brings powerful new features, but building a truly scalable application requires careful architectural decisions.
The App Router fundamentally changes how we structure Next.js applications, moving towards a more component-centric, server-first approach.
Best practices include using Server Components by default to reduce client-side JavaScript and improve initial load times. Strategic client boundaries — only use "use client" when absolutely necessary for interactivity or accessing browser APIs. And colocating data fetching with the components that need the data, using React Suspense for granular loading states.
By following these patterns, you can build Next.js applications that scale gracefully as your user base grows.
