Not really sure that's a close comparison. From a language semantics perspective, yes, OCaml and F# are very similar. But F# has access to all of .NET, so you a

Not really sure that's a close comparison. From a language semantics perspective, yes, OCaml and F# are very similar. But F# has access to all of .NET, so you aren't going to be at a loss for libraries -- which is probably the biggest challenge in using OCaml in production, as discussed in the OP.