Yes I've definitely seen evidence that Haskell has become a marker language on one's CV of the right attitude (somewhat taking over from python a few years ago)

Yes I've definitely seen evidence that Haskell has become a marker language on one's CV of the right attitude (somewhat taking over from python a few years ago). In fact one recruiter reported back that a client said "He's done some Haskell, we'll definitely interview him" (that ended up being the job I landed too).