I think the unusual thing is that it was written in a week. I highly doubt that they read and understood all 1M lines. But if it works and people use it, what does that mean for software? Should we still care about the code that’s written? Should we even look? I’ve always thought so, but maybe I’m just biased.

I was going to comment this same thing.

I don't know enough about what Bun does... But Rust is so insanely complicated, it's hard for me to wrap my head around how Bun is equally complictated.

If anything, it's a little surprising that the Rust code isn't significantly larger because I tend to think of Rust as requiring somewhat more boilerplate than JS.