What is the advantage of OCaml?

I carefully observe how Tezos is develop from technical point of view and as I am software engineer I am really curious what is the real advantage of OCaml language? Why founders of Tezos has chosen the language?

Of course before the question I was looking for an answer but found something like:

OCaml has a diverse, worldwide community and one of the main benefits is the ability to easily reach each other.

Can anybody send me a link with technical advantages? I look for the advantages of the OCaml which eg. Kiln node has gained thanks to the language.

Originally I ask on Tezos StackExchange but well… https://tezos.stackexchange.com/questions/2683/what-is-the-advantage-of-ocaml