Eunuchs and MS DOS (as far as file systems) won and attempts to overcome their limitations can only be made now in various forms within products running on top of them.
Years ago I was able to write a version control system, before I ever knew of Clear Case, that took advantage of, was based on VMS’ multi-version file system RMS. It worked like a charm. In RMS, one (every user) could configure the number of version he wanted to retain, and we usually settled on 3, though the limit, if I remember correctly, was initially 32, and with later releases of VMS, unlimited. This is 1981.