Does any of this transfer over to Bun as well?

Bun is pragmatic, extremely fast and self-contained. Ryan Dahl is a hero of mine but Deno could be neither of those, which is a shame, but to answer your question, no, not much of these can be said for Bun.

Definitely, as it depends on where Zig goes, and what Antrophic will make out of it.

I honestly can't think of a single practical scenario where I'd pick Deno over Node + npm today. Bun, on the other hand, has pretty much claimed the performance crown for itself at this point.

For me yes, I have never found these alternative runtimes appealing.

However Anthropic owns Bun now, so a different story will unfold.