I recently coined a term: "Haskell Superiority Paradox". If this language is so advanced so superior compared to other languages, why we don't see its wide adoption in the industry? To me, this is a total failure. But the world doesn't end on Haskell. There is Scala, there is Clojure. Erlang, F#, OCaml. If we take FP in general, we'll see that in reality, functional programming is everywhere. This was a clear trend in C++ last decade, FP is very essential for JavaScript and C#, we see the raise of Rust, the language that borrowed so much from functional languages. Functional Programming has definitely found its path to the industry. But about functional languages... Well, this is what I'm going to talk about.