Comment by TallGuyShort

I've never encountered a real OCaml project or anyone who uses it in my career (same is true for Haskell). I have assumed these languages are a hobby for CS academics and get used for pet projects by their devotees. Not that that's bad - they're interesting and the ideas are cool. I would just be afraid of locking myself into an isolated ecosystem that it's hard to hire experienced people for. Is anyone on HN actually using these languages for scientific computing, or other large production projects? Curious to know what the pros / cons are in practice and how common that is.