Comment by prohobo

One heuristic for the quality of a language is to literally ask "what is it good for?"

Just off the top of my head (I'm skipping a lot of categories and languages):

C/C++/Rust are great for systems programming, games, and performance critical applications.

Go/JS/Python are great for creating web servers, data processing (Python mostly), and small apps/scripts.

Haskell? I have no idea.