Why I Left Next.js for “TanStack Start” in 2026.

A developer shares their experience migrating from Next.js to TanStack Start (React 19 + Vite) after finding the App Router too abstraction-heavy. The team was slowing down debugging framework internals rather than shipping product features. After switching, their shipping velocity reportedly doubled within two weeks. The post frames this as a story about over-engineered frameworks rather than a criticism of Vercel specifically.