Honestly, I think that the reason why Haskell never got adopted is that they never really tried. A ton of the decisions over the years they’ve made would’ve been insane for an industry language, but appear to have been non-problematic for their goals. What would’ve happened if they’d tried is an interesting counter factual.

My biggest problem with Haskell is that is damn near impossible for me to mentally parse. I always end up liberally sprinkling my code with parenthesis and “$” hoping to make the compiler happy. I never managed to develop a mental framework to help me out here.