Since many people are agreeing with you let me disagree for the sake of doing so:
I’ve used Haskell in production (not a very big service but anyway) and while I enjoyed it, I think that it was at the cost of my employer. Spending my time studying about lambda calculus and suffering through slow compile times of GHC isn’t a very rewarding experience (for me personally). IMO I’m still a better programmer for knowing the concepts of, but not by much. It’s a field bigger than Haskell and IMO writing production Haskell code only skims the surface of lambda calculus/theory.
I’ve used Haskell in production (not a very big service but anyway) and while I enjoyed it, I think that it was at the cost of my employer. Spending my time studying about lambda calculus and suffering through slow compile times of GHC isn’t a very rewarding experience (for me personally). IMO I’m still a better programmer for knowing the concepts of, but not by much. It’s a field bigger than Haskell and IMO writing production Haskell code only skims the surface of lambda calculus/theory.