The main thing is that bucket namespace is global. There is only one bucket "foo" worldwide. That means that every bucket mutation event (e.g. bucket deletion

The main thing is that bucket namespace is global. There is only one bucket "foo" worldwide. That means that every bucket mutation event (e.g. bucket deletion or creation) requires co-ordination between regions. When that big us-east-1 region outage occurred a year or so back every other region worked fine except for bucket mutations.