It's kind of alluded to, but, while FP languages, as a broad category, were the progenitor of a lot of different PL ideas, Haskell ended up implementing many of

It's kind of alluded to, but, while FP languages, as a broad category, were the progenitor of a lot of different PL ideas, Haskell ended up implementing many of them in a single place. It's fair to say "we were influenced by (this other language that originated an idea)", but it's also fair "and Haskell also has that feature". Do it enough times, and you start to see why the claim that Haskell is important; being a research language it's able to have all of these ideas implemented in it in pursuit of its design goals, where other FP languages pick and choose in pursuit of a different one.