I never wrote a production system in Haskell, no, and haven't worked as part of a team writing Haskell for money. I wrote some convenience utilities for myself,

I never wrote a production system in Haskell, no, and haven't worked as part of a team writing Haskell for money. I wrote some convenience utilities for myself, and did more than a fair bit at codewars. > Do you feel that learning Haskell made you a better programmer in other languages? Exactly that. So while Haskell as such was not professionally useful to me, having learned Haskell made me much better in Ruby, for example. And more recently when I did a lot of Rego I still find the Haskell style of thinking very useful.