So - yes, there are certainly advantages in moving to gerrit. But, compared to github, the documentation is much less clear. However, maybe the right response is 'fix the docs' instead of using github :-)
Agree - lets fix gerrit docs and benefit the entire MW infrastructure. And
I think it is by far better for MW in general - some pywiki users turn into MW devs, and if jumping from one to another is trivial, more might join (this is how I got into MW long time ago).