I wouldn't call any port "prudent". In general, taking mature software and doing any major rewrite is one of the riskiest thing you can do. It is a large scale attempt to fix what isn't broken.

Sometimes it is worth it, but it may also kill projects. A risky move. And AI doesn't help its cause. AI can save a lot of time when making ports, it is one of the things it does best, but it doesn't protect from regressions.

I am not using Bun in production, but if I was, I would consider it a risk. Not because of Rust vs Zig, but for changing things that work.

This is likely irrelevant given bun has stopped taking community PR's entirely and Jarred is pitching that human contributors should be banned.

Why didn't they use Rust in the first place then ? All this was true before AI

I don't think Zig is different enough from rust or any other systems language for it to matter. If you can write rust you can write Zig.

100%. For many people, Bun is the only reason they've even heard of Zig. I'm not in a position to comment intelligently on comparative language features per se, but when it comes to mindshare and community size, Rust is a clear winner.