[nijave]

They definitely roll out code (at least for some services) one region at a time. That doesn't prevent old bugs/issues from coming up but it definitely helps prevent new ones from becoming global outages.

[valenterry]

Right, that makes sense. But if it's an evil bug that triggers e.g. over a year-change only, then that might not help.

So I suppose theoretically also AWS can go down all together, even if less likely.