[shados]

My gripe about sagas is that it mostly reimplement observables-like APIs on top of generators. Observables do take a bit to learn, but once you learnt them, the knowledge is more or less reusable across platforms (even if it's a little different, you can do Go, Scala/Akka, Elixir, and any language that has an Rx implementation).

With Sagas, while the upfront cost and the gain are in the same ballpark for Redux apps, that's basically the only place you'll use the investment. You also cannot leverage the collective knowledge and patterns of the tens of thousands of engineers from other platforms.

That makes it a lot less palatable to me, even though they are easier on the eyes at first, especially for people with mostly procedural programming backgrounds (which is the more common case).

Unlike the initial statement, I do think they're easier to test than even Observables/Promises, because generators make it so easy to inject results and dependencies anywhere in a complex flow. But marble tests aren't bad either.