Could be Facebook as I think production releases are always rolled out in phases e.g. first to 10 users, then 100, then 1000 and so on. That means there's much

Could be Facebook as I think production releases are always rolled out in phases e.g. first to 10 users, then 100, then 1000 and so on. That means there's much less chance of even the worst mistake having a serious effect.