Even if AI had not been used, the changes would not have been upstreamed, see https://ziggit.dev/t/bun-s-zig-fork-got-4x-faster-compilatio... tl;dr the supposed improvements are not sound and the zig compiler has already gotten a whole lot faster

This should be the top comment in the whole thread. AI is not the point, the PR is just not of a good quality.

What a sober, detailed forum post.

Thanks, that is the answer.

That is a devastating comment. I will now be extremely skeptical of bun.