Yeah, I'm not at Facebook, but runs Netlify. I still have several services written in Haskell running in production and they've been rock solid for years now.

Yeah, I'm not at Facebook, but runs Netlify. I still have several services written in Haskell running in production and they've been rock solid for years now. For the kind of problems I used to solve with Haskell (typically tasks involving a bunch of concurrency and IO) I use Go now. Not because it's a better language, but because Haskell is so drastically different that having anyone else maintain these services would require tons of training. Meanwhile Go is extremely practical and very easy to learn.