v2 has released most of the planned features, the last feature is still under development (https://github.com/casbin/Casbin.NET/pull/230), we plan to release the RC branch next month.
No, V2 still working, it is necessary for future development and has a lot of necessary refactorings.
TL/DR: Should I use Casbin 1 or 2?
The latest update for V2 happened in 2021-08, while the latest V2 update just happened a couple of days ago and this poses some questions: