I always think that this attitude is a little bit off. Obviously learning a new paradigm or a new language is great and expanding your horizon is very rarely bad, but I feel a little bit sad about shoehorning Haskell, or functional languages in general, still into this education category.

Haskell is a very solid production language and you can put industrial grade software in Haskell out there, and it is in fact used by a fairly serious amount of companies at this point.

Instead of just taking Haskell features and porting them into already adopted languages, I'd really like to see more companies just go directly with Haskell, or Clojure, or Ocaml and F#. It does work.