You speak of "the business case" as if there is only one kind of software business in the world, one that focuses on getting to market quickly with inexpensive developers. Reasons like "OCaml is hard" are short-sighted unless you are only planning for the short term. You wouldn't have to hire for OCaml, just for functional programmers.
That's stupid - all software businesses are (or at least should be) focusing on getting to market quickly, and there's no justification for the view that "a swarm of middling developers" is commonplace.
Parent was worried about availability of OCaml developers, and would "pick RoR any day just to eliminate the risk of getting to market late." Never mind that RoR is a web framework, this kind of thinking, that some technology is a silver bullet, or that another is unusable because it is less popular, or that six so-so developers are worth as much as two or three good ones because they're easier to find, is a real problem. It's immature to say out-of-hand that some language, for any application, is "too risky" when it has a good industry track record.
