There is a benefit in being able to read and understand your code. If you’re most proficient in Python, it’s reasonable to want to stay there, perhaps looking to PyPy.
Also, of course, the majority of SaaS apps (perhaps most apps in general?) are not compute-bound, so gains from performance alone shouldn’t be the only metric.
My current job has a mix of Python and Go. Personally, I dislike Go. I don’t like its syntax, I don’t like its utter lack of formatting standards (gofmt is not a standard; also it sets tabs - ugh), I don’t like its insistence on static linking, and I don’t like how people claim it’s a great scripting language when you can’t just run a file on its own (and its stdlib is weak sauce compared to Python).
Rust is nice to read because you can see from a function signature what it mutates
If you write slow rust, it's very easy to read, and still plenty fast.
I can read rust much easier than go at least. If the Python doesn't have types then it's about even as well.
Of course, Claude understands Rust, too.