Bun

Vite's reliance on Rollup for production builds is slower than native alternatives like esbuild or Bun, creating a performance gap between dev (esbuild) and prod (Rollup) experiences.

Developers must maintain package compatibility across multiple package managers (npm, pnpm, yarn) and JavaScript runtimes (Node, Deno, Bun), significantly complicating maintenance and distracting from security concerns.