Depends on what you compare it with, I guess. (I worked in OCaml and Haskell and other 'weird' languages professionally in different jobs for many years.)
Although I'm not a Microsoft fan, their docs for F# are worlds ahead of anything I've seen for OCaml (I know a few OCaml folks are working to fix this).
I've considered trying it for Advent of Code this year.
Curious to know more, do you think can make a long-form of "why" and a detailed experience? If you have some time, would be massive to compare it with what's the same experience today
I also worked on an ocaml codebase for a roughly similar time frame and found it extremely pleasant. Probably the best time I spent as a dev with working on an Ada project with a great architecture.
What were the main issues you came across? What language would you prefer if you had to start from scratch and had the choice to go with anything else?