But it doesn't seem to.

Products built in haskell don't seem to have dramatically lower maintenance costs. They don't tend to have features that other products don't have. Nobody buys math.

In all of the recruiter spam I get, the only time that recruiters lead with "what language we use" rather than "what we are building" is when the company is using haskell. This seems backwards and gives a poor impression.

There might be 100 POPL papers that I can use with haskell extensions but ultimately the act of coding is nowhere near the top of the list of important things when building systems to solve problems.