I'm not saying that they can't work that way, more power to them. But then having the expectation of anybody using it in a professional setting is also unrealistic. You can't have your cake and eat it too, either it's your personal project and you are fine with nobody using it but you, or you evangelise for people to use it, but then you also need to make at least some effort to not break their stuff on a whim, or to accept their change requests when they put in the work as was apparently the case for bun.
Tbh I don't see Zig hit 1.0 with a meaningful user-base, it's probably going to mostly get eaten by Rust or some other language and will continue to exist as a niche thing, kinda like D.
Having one of the flagship/showcase codebases rewritten to Rust in a week feels like a death knell. Either the community or the language is too unworkable if someone that heavily invested into it jumps ship, and I'm afraid it's kinda both.