I haven't yet felt the need for third party tooling in OCaml. OCaml has real abstractions, easily readable modules and one can keep the whole language in one's head.

Usually people do not use objects, and if they do, they don't create a tightly coupled object mess that can only be unraveled by an IDE.

I prefer the Haskell version. One can read it as a full sentence instead of being interrupted by the boring imperative Python version that breaks the train of thought on every line.