At home, I started using it as my primary language just a few weeks ago.
I love OCaml as a language but the ecosystem is really pretty bad. There is just too much fragmentation and lack of libraries. I would have expected more from a language that is over 20 years old.
Don't get me wrong, I want it to succeed since I agree it has a really nice mix of features.. I just have my doubts given its track record so far.
While I agree... Javascript is also just as old and arguably more fragmented (with the exception of jQuery).
That being said perhaps unlikely but OCaml may make a massive comeback just like Javascript did (particularly if for some reason Rust fails which I doubt).
Currently I'm designing a small language so I can learn OCaml better. I'm planning to use the ocamllex and menhir tools for lexing and parsing. I'm sure utop will come in handy for testing out ideas.