Python

Deno looks interesting.

But Bun choosing Zig makes me think their priorities are not my priorities. As of now, you choose Zig (a not-yet-stable language) because you want to learn Zig and make a neat side-project. Those are not my priorities. Zig offers no unique advantages other than neat new syntax.

Deno chose Rust, which, like Zig, is new, but Rust has reached 1.0 and offers a unique advantage with its safety features. I'm not saying anything about the greatness of Rust here, only that Rust does offer unique advantages, and Rust could be chosen because of general priorities.

Bun chose Zig and then worked backwards and formed their priorities around Zig. Deno formed their priorities and their priorities lead them to Rust.

That's how I feel anyway.