Firstly, the question was very specifically to coldtea to help flesh out his/her claim that it is "not easy to adopt the extra features piecemeal". So far that

Firstly, the question was very specifically to coldtea to help flesh out his/her claim that it is "not easy to adopt the extra features piecemeal". So far that claim doesn't seem to have be substantiated. Secondly, are you really saying you believe that Haskell doesn't have all these features? That there aren't good ways of mutating arrays, writing CRUD apps, combining effects, etc.? Presumably then, your jaw would hit the floor if I could demonstrate that everything you believe is false.