It is difficult to answer such questions because the whole community has been asked. They are better suited for the OCaml mailing list, although people there may be a little disappointed.
So, I can’t answer for the whole community, but I personally think that you are here. When someone says "pure OCaml", it usually means that the program is implemented only in the OCaml language without any Cstubs.
OCaml. , -, . , String, , -, .