> It has an incredibly powerful Hindley Milner system under the hood. Scala does not use Hindley-Milner, which is why it has much poorer type inference compare

> It has an incredibly powerful Hindley Milner system under the hood. Scala does not use Hindley-Milner, which is why it has much poorer type inference compared to Haskell or OCaml. It uses subtyping to encode sum types and under many circumstances will infer "Any" for a type.