Rust is indeed more practical than Haskell, I wouldn't deny that. But Rust lacks full support for higher-kinded types. Exploring a few type classes (known as traits in Rust) like Applicative, Foldable, Traversable can really open your mind. An exaggerated quip by Haskellers is that there are entire libraries on NPM that simply implement the single function `traverse`. While that's an exaggeration, it really helps to look at a few dozen things the single `traverse` function can do to realize its generality.
Well, we have entire libraries in Haskell that implement `traverse` for a specific data type, too. The nice thing in Haskell is that the language is strong enough that we can tell the compiler that all those disparate implementations have something in common.
