I guess this makes sense Github announced they are gonna bring stacked PRs this year so I think that kinda makes Graphite obsolute.
Woahhhhh I missed this. Got a reference or link? My Googling is failing me. That's my biggest complaint about Github coming from Gerrit for Open Stack.
I've been using git spice (https://abhinav.github.io/git-spice/) for the stacked PRs part of graphite and it's been working pretty well and it's open source and free.