The more of Haskell's ideas that bleed into mainstream languages, the happier the world will become. It is just so beautiful how these higher abstractions can become so useful and powerful for tying all kinds of things together.

I've long suspected that one of the things that makes monads notoriously difficult to explain to people outside of the Haskell ecosystem is that very few other languages even have a kind system that you are allowed to manipulate in code (and in some, like C++, it's so esoteric that you basically never see it). First explaining that you can even abstract over "type->type" kinded things gets you a lot of the way towards monads without actually describing monads.