I don't think language would matter much as the primary delay is getting a response from OpenAI apis. The advantage of Rust (or other similar language) is you get a simple single executable. Otherwise Python is completely fine.
I basically use this any time that I am in the terminal already and have a question that I think could reasonably be formatted fine there. I'd say, I use it for 30% (conservatively) of my ChatGpt queries. Naturally the web interface is way better for lots of stuff, but sometimes breaking out of a terminal session is jarring.