For one, Rust's "trait" system, which is a foundational part of the language that enables a lot of Rust's expressivity, is a limited imitation of Haskell's "typ

For one, Rust's "trait" system, which is a foundational part of the language that enables a lot of Rust's expressivity, is a limited imitation of Haskell's "type classes". Rust would be a very different language without it.