> the compiler standard library was not a serious proposition, it is becoming more so now.

This is actually one of my grief with OCaml. I wish I didn't have to use Core. I don't look much at the std library anymore.

My other grief is async (Lwt or Async). It forces to use monads which don't look very pretty in OCaml. That being said, I haven't looked at what OCaml 5.0 bring to the table on that front. This was my experience 5 years ago basically...