re: “ As for Haskell, I like the language, but it's super fragmented, everyone has its own Prelude and favorite language extensions....”

I really like Haskell, but this aspect of the use of Haskell also bothers me. I use a small subset of Haskell and language extensions, a small subset that I am happy and productive with, but it takes me a lot of effort to understand other people’s code.