“Real maturity problems”: Not every developer is thrilled with Bun after Anthropic acquisition

After Anthropic acquired Bun to support Claude Code and AI software engineering, developers split over the move.

Supporters praised Bun’s speed, while critics pointed to maturity gaps, memory usage, and complexity.

Some also highlighted Bun’s large backlog of open issues versus Node.js, raising reliability concerns.

The debate matters because AI coding tools increasingly depend on runtimes like Bun, and stability could shape adoption.