My point is that functional languages have all these features, even if some are found in non-functional languages these days. Even functional langauges themselves are often not only functional. You can do OO in Scala, imperative and OO in OCaml. OCaml is actually a good example to talk about, as the recent developments are all about adding multicore, better concurrency and better tooling, something that Go was very good at from the start.
In a way, you can see that the people using these languages that may appear very different are converging to the same "ideal". And that's not a surprise, both languages have a very Unix-y origin, and origin in Pascal/Modula. Go added to that CSP, OCaml added ML. These days OCaml is adding things to better handle the CSP part, and some people are asking for Go to better handle the ML part.
In a way, you can see that the people using these languages that may appear very different are converging to the same "ideal". And that's not a surprise, both languages have a very Unix-y origin, and origin in Pascal/Modula. Go added to that CSP, OCaml added ML. These days OCaml is adding things to better handle the CSP part, and some people are asking for Go to better handle the ML part.