Or all goes together. The story goes more like non...

# coroutines

[uli]

Or all goes together. The story goes more like non-blocking io for example give much better scalebility then blocking, because you don't need massive amount of threads for a massive amount of connections. But non-blocking io is hard to get right. That's why people often don't use it.
With coroutines non-blocking paradigms become feasible in a lot more contexts.
So the answer is, if you are doing the same things as in eg. Rx, there will be no hard benefits. But you might start doing things that were to complex before. And these things might come with hard benefits.