Problem Statement
What is the main difference between Pages Router and App Router in Next.js?
Explanation
App Router introduced in Next.js 13 uses the app directory and leverages React Server Components as the default, allowing components to run on the server and stream rendering,
while Pages Router uses the traditional pages directory with client-side React components. App Router provides better performance through streaming and partial rendering, improved layouts and templates system, built-in loading and error states, and more granular data fetching.
Both routers can coexist in the same project during migration.