As someone who has been learning Haskell recently I think I can bring up a point that no one else has. Record syntax in Haskell sucks. Most business programming revolves around a form of DDD, where each of your business entities are fairly well defined. Creating records that match these business entities is fairly simple, working with them is not. None of the web frameworks I've seen follow a model based approach where you bind directly to your form representation of a model. I've been trying to figure out a way to do this in Haskell, but it looks like I have to learn Template Haskell and Generics on top of the already steep learning curve of Haskell, for something that would be simple in almost any other language. So far I haven't given up, but I don't see mainstream programmers getting into Haskell until they can describe their processes in a model focused fashion (and no, I don't mean with OOP).
