Comment by toast0
4 years ago
I think it's because shared memory concurrency is easy to start on in lots of popular languages. But it doesn't take long until you're in a tricky mess of locks.
Actor style based on explicit communication and no shared memory is a lot easier to work with (IMHO), but it's not as easy to get started on because it's not as simple as pthread_create and go.
No shared memory will also mean that actor style is slower-than-single-thread-slow, when the "message-size to processing-per-actor ratio" is not right.
Actors and message passing is great for problems where it fits and worse than useless where it doesn't