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AI Summary
- Evan You shifted from UI (Vue) to tooling (Vite, Rolldown) driven by aesthetic and developer experience improvements rather than technical necessity alone
- Rolldown (Rust-based) replaces Rollup, offering massive speed improvements and better bundler architecture; Rust chosen over Go for ecosystem maturity
- Bundlers remain necessary for modern development; Vite's superior DX comes from dev server architecture; Next.js could benefit from Vite integration