> I don't like the kinds of discussions it attracts...vague hand-wavy arguments about "expressiveness" and "purity".

Pretty much every argument about how to write Go programs is hand-wavy.

I'd actually argue (from years of experience at least) that FP discussions of code are pretty much the only ones of actual substance instead of mostly aesthetics and opinion and heuristic.

The best part of writing Haskell professionally is I no longer have to deal with hand-wavy programming folk-isms. We can do better, and it's not that hard.