It seems fair to say that Lisp was also considered arcane for a number of years, although it is now (somewhat) thriving in the form of Clojure. It's a tough que

It seems fair to say that Lisp was also considered arcane for a number of years, although it is now (somewhat) thriving in the form of Clojure. It's a tough question to answer, but I think you're really asking whether it's better to take a chance of being any sort of early adopter, or wait until it's generally accepted. Even though these languages have been around for decades, they are just recently being spliced into the mainstream via lambdas, immutability, etc. So I could easily see Haskell make a comeback.