It depends on how much time you want to spend on admin. If you run stable it just runs, you don't have to do a thing, until the next update (1.5 years or so) a

It depends on how much time you want to spend on admin. If you run stable it just runs, you don't have to do a thing, until the next update (1.5 years or so) and you can plan in advance to have a down-day. If you run testing you'll have a bit more admin to deal with, whenever this or that changes, and you have to configure the newest and greatest. And you can't wait either, because changes are mixed with security updates.