Learning it is challenging but achievable by most interested programmers. It's vastly different than most mainstream languages so it's not as easy to pick up as

Learning it is challenging but achievable by most interested programmers. It's vastly different than most mainstream languages so it's not as easy to pick up as C# is to a C++ programmer because so few concepts translate from C++ to Haskell. But it's not impossible if you're seriously interested. You also don't have to learn all of it to start using it. The majority of code I write in Haskell doesn't use anything more fancy than function composition, ADTs, and some type classes. You can do programming at the type level but that's not a requirement for entry.