Bun is great software. I use it all the time. It is fast and practical, and the team ships constantly. It makes TypeScript a joy to work with in small scripts, apps, tests, and tooling. That is why this is frustrating. I want Bun to win. I want a serious Node.js alternative. I want faster installs, faster tests, better bundling, and less toolchain bloat. But I am worried about Bun now. Anthropic owns Bun Anthropic acquired Bun in December 2025. The announcement said everything I wanted to hear: Bun stays open source and MIT-licensed, the same team keeps working on it, and the roadmap keeps focusing on high-performance JavaScript tooling and Node.js compatibility. It also said this: Claude Code ships as a Bun executable to millions of users. If Bun breaks, Claude Code breaks. Anthropic has direct incentive to keep Bun excellent. In December, that sounded reassuring. Anthropic had a huge product built on Bun. That meant Anthropic had a direct incentive to keep Bun fast, stable, and excellent.…