I agree there are lot of big wins in uv that tools written in python could take advantage of, and ultimately I think uv is fast because they're obsessed with making it fast, which is why they chose to use rust. I don't see that same level speed obsession with the other tools.

Instead of "It's fast because it's in rust", I'd say: "It's fast because they chose to use rust for their python tool, which means they care a lot about speed."