On the other hand, it might send potentially negative signals. Someone who "hacks" on a less-used language might have a programming language fetish, i.e. "why w

On the other hand, it might send potentially negative signals. Someone who "hacks" on a less-used language might have a programming language fetish, i.e. "why would you ever use Java...Rust is better in every way". And yes, I've met a few of those.