> OCaml is definitely much nicer to use than C and C++. But I don't find it that much nicer to use than Rust TBH.

I find OCaml quite a bit nicer to use than Rust, though in a lot of ways that's due to my preference for structuring code using modules and functors.

However, due to Cargo and the fact that Rust has good Windows support, I end up reaching for Rust much more often than I do for OCaml.