There are many additional reasons that impact the maintenance of established code bases and code reuse. OCaml's Module system is good in this regard.
In addition, there are many other companies that use functional languages and my (subjective) experience had been that such orgs are able to achieve far more with smaller teams (cf Whatsapp and Erlang). Facebook and Bloomberg are also users. I find it somewhat bizarre that people are making an issue of the business case for using OCaml in a startup. How many people did that before using Python/Ruby/etc back in the day?
In addition, there are many other companies that use functional languages and my (subjective) experience had been that such orgs are able to achieve far more with smaller teams (cf Whatsapp and Erlang). Facebook and Bloomberg are also users. I find it somewhat bizarre that people are making an issue of the business case for using OCaml in a startup. How many people did that before using Python/Ruby/etc back in the day?
Edit: and here's a clicky link to PG's essay http://www.paulgraham.com/avg.html