I think "feasible" is more of the discussion. Interesting how we learned during the 08 financial crisis that everything is correlated in a crash... I think there are similarities to the cloud, Black Swan fat tails if you will.
I thought about including some mention of this. I'm sure Amazon though this specific crisis as a six-sigma event. Taleb points out in the book Black Swan, the sum of all possible six-sigma events happens a lot more often.