RxJava 2.x is now stable and the way to go. It should be the default branch when visiting https://github.com/ReactiveX/RxJava/
Feels too early.
I'd err on the side of too soon than too late. RxJava 2 is never going to get as much attention toward migrating as it is right now.
This is my suggestion about managing the versions:
February 15, 2017: Set 2.x as the default branch
June 1, 2017: 1.x no longer accepts feature requests, only bugfixes to existing operators
March 31, 2018: 1.x end-of-life
Somebody switched the default to 2.x without noticing me?! @ReactiveX/rxjava-committers ?
Looks like I have to go with this now. Updated readme with additional info.
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Feels too early.