Heh, that's a contentious topic. Personally, I would like to do so. I think I speak correctly when I say that most of the Infrastructure team would like to do so, to increase security/auditability and ease the maintenance burden on ourselves.

However, large portions of the team are opposed to Gerrit because a) it doesn't integrate as well with our other systems (such as trybots and cq) and b) the UI has some issues. We are working with people to try to fix those, but there's no particular timeline for switching, or even a guarantee that we will.