Здравствуйте, LaPerouse, Вы писали:

Этож старо как мир.
https://www.chrisstucchio.com/blog/2013/actors_vs_futures.html

Actors are awesome. But they aren't the only abstraction we have. Futures are another great abstraction which work very well with purely functional code. Actors are great for maintaining state, futures are great for everything else.