> Apart from pro-AI or anti-AI posturing how have the last few months not looked good for Bun, exactly?

The blog post states quite clearly that Bun stopped posting any release.

During the Zig/pre-Rust days, Bun was posting s new release each 2-3 weeks.

Since then, Bun's Rust migration is correlated with a complete stop of Bun's release cadence.

that could just be de rigeur enshittification.