A big reason for this is that a big chunk of Haskell adoption is in software you will never know about: financial risk systems for major investment banks (one

A big reason for this is that a big chunk of Haskell adoption is in software you will never know about: financial risk systems for major investment banks (one of which has over 400 KLoC in Haskell), crypto work for the NSA, backends powering parts of large sites (facebook, bump, etc) and the full stack on some smaller ones (planely, yesodweb, and quite a few others I can't mention).