> The reason GHC didn't just turn on all flags by default is that many of them are mutually incompatible, so your individual .hs file has to pick a compatible set of language features it wants to work with.

This is profoundly untrue. Its not an opinion, its simply wrong.

Other things said about Haskell, such as "memory leaks are difficult to debug" is the type of thing you hear people repeating a lot but I experienced very little of. Pretty much every language has flaws that are a bigger issue and cost more wasted time than that.