Agreed that processes in Erlang is even better objects than objects in OOP.

>>I cannot express my concurrency ideas-- that erlang makes super easy-- in the OO languages.

In fact main Erlang ideas are many times "stolen". I discover Erlang in: Scala (obvious), F# (also obvious), D (also obvious).

Actors + messaging = "DIY Erlang".

Although I do not know a language that makes code hotswapping as fundamental feature.