By your logic, Bun has no right to exist because it only supports Node.js APIs and doesn’t have its own APIs
I don’t know much on the topic, but I know I used Bun a bit for some scripts, and it most certainly does have its own APIs, so that’s incorrect.
I don’t think I’d agree about it being negligible, but I think that’s ultimately subjective, so fair enough. I get the impression a lot of Bun’s own library are nicer to use equivalents of libraries present in Node, but I think even that is significant for anybody looking to write new code.