I may get some flak for this but Haskell still being called a research language is doing Haskell a huge disservice for adoption. The new ideas of Haskell are now old and well-known in programming languages research for over a decade. Seeing Haskell as a research language causes the community, by and large, to remain in an academic-mindset. But what the Haskell community needs now is an engineering-mindset. I think Doctor_Ryner in the OP states it perfectly:
“In other communities people mostly discuss regular production problems and data structures, while in a Haskell chat people discuss monads, applicative functors, crazy types and things like that.”
This is why use cases and how only Haskell enabled solving it are rare.