It's just an echo chamber effect. People still use other languages for their daily stuff. It's just that people want to write their hobby projects and new small work stuff in go or rust. Would take some years for main stream adoption that current popular and established languages enjoy. But rust and go have momentum going for them.
I think the difference is that Rust and Go projects seem to be posted to HackerNews (and upvoted!) much more than Python and C++ projects are, despite there being way more of the latter.
It seems everything these days is going either Rust or Go.