A dependency that forms the foundation of your build process, distribution mechanisms, and management of other dependencies is a materially different risk than a dependency that, say, colorizes terminal output.
I’m doubtful that alone motivated an acquisition, it was surely a confluence of factors, but Bun is definitely a significant dependency for Claude Code.
MIT code, let Bun continue develop it, once project is abandoned hire the developers.
If they don't want to maintain; GitHub fork with more motivated people.