Re: make a hasty move to another region
Not exactly. You can indeed easily create the infrastructure elsewhere. Orders of magnitude easier than having to lease a coloc and put servers in by yourself. But you still need to setup your stuff. Many already do that and it's the standard practice. But those that operate from a single region may have trouble doing it because they haven't designed their systems like that.
Google, Amazon and Microsoft won't move your stuff because that's a very sensitive thing to do with legal complications. They do offer some global services where you don't depend on a single location but region-specific services need to be replicated by the user.
Those that have setup their infrastructure in a redundant way can stop using these regions for a day or two and just scale up their alternate locations.