[dannyw]

If you're in the business of being a massive cloud provider, hopefully restarting a region is not an untested procedure for you.

You could always test this in a live environment before a region becomes open to customers.

[Xylakant]

“Test in a live environment before the region becomes open to customers” is a test that’s not entirely representative for “the region had an emergency shutdown with customers on it.” And the latter is something that you can’t reliably test obviously - unless you decide to crash a whole region in live traffic.

I’m sure they have checklist and procedures, but an unknowable laundry list of things will go wrong.

[smueller1234]

You're right. It's not untested at all. It's just not instantaneous, unfortunately. :)