It’s a way to go, but I wouldn’t recommend it.

The learning curve on RxSwift may be a bit steeper, but it’s a lot more useful.

Futher, RxSwift has an active community, the project has hundreds of contributors, has plenty of documentation, articles, videos, and even an entire book devoted to it.

It’s also based on ReactiveX, so the principles you learn on one platform can be applied to Java, JavaScript, Kotlin, Dart, or pretty much whatever language you want.

And one final point, and a relatively important one at that: RxSwift is actively maintained. It looks as if the Hanson code base hasn’t been touched in two years.