these days I mostly use vscode / cursor, although I still really like vim and use it for languages that I know really well (mostly python these days) and quick edits.

I spent much of my professional career at Jane Street Capital, which means that I spent a long time just writing OCaml and some bash (and a tiny bit of C). I'm very comfortable with Python, and over the last year I've gotten pretty comfortable with frontend javascript. And now golang!

I could probably write semi-reasonable java, ruby, or perl if you gave me a few days to brush up on them. And it'd take me a while before I was happy putting C on the internet. Not sure otherwise.