Node is fine. This is very much old man shouts at cloud. Pyright is really quick. Node is fast enough for a majority of uses.
That said, Node is awful as a backend language, and speed has nothing to do with it. I will write Go, Python, Rust, or anything else because of how those languages have been designed. JS doesn’t belong in my backend—YMMV.
Web devs; I thought that was implied.