I don't like the friction introduced by the app router. Even though the merits of layouts, streaming and React Server Components are clear. I have a stable site/app and don't need to migrate any time soon, I rather wait for something better. Which in my mind is something Server Side Rendered, written in TypeScript and close to the native DOM API.
Engineers at Manifold are looking for your opinions (and bets) on the new app router vs pages router.