Bun getting acquired by Anthropic is bigger than it looks. Bun had huge adoption but zero revenue and limited runway. Meanwhile, Claude Code depends on Bun for its single-file executable and future sandboxed code execution (and the latter part is probably one of the biggest reasons for this acquisition). Anthropic didn’t just buy a JS runtime - they bought stability and the ability to control the foundation their coding agents run on. Both promise: Bun stays MIT-licensed, open source, and focused on high-performance JS tooling with ongoing Node.js compatibility. We'll see if that remains true.