> having used gerrit 10 years ago there's nothing about github's PRs that I like more, today.

I love patch stack review systems. I understand why they're not more popular, they can be a bit harder to understand and more work to craft, but it's just a wonderful experience once you get them. Making my reviews work in phabricator made my patchsets in general so much better, and making my patchsets better have improved my communication skills.