Both their AI policy and their rejection of Bun's performance PR were level-headed and well-reasoned. And the link seems more like a proof-of-concept than anything else.
It's true corporate sponsors are a big help with language development, but not at the expense of conceptual integrity.
[1] https://ziggit.dev/t/bun-s-zig-fork-got-4x-faster-compilatio...
In addition, the link in the comment you replied to explains why the PRs Bun opened to Zig would have lowered the quality of the compiler and how Zig has achieved even greater speedups, with more widely applicable features like incremental compilation and the self-hosted backend.