This does worry me. If there is a shortage of resources suddenly or a DC fire that takes out a region, then what? We have contingency against this via our own infrastructure but I worry about organisations who don't have any.
Then some businesses will be out for a few hours / days.
No big deal.
From WWII to 9/11 to Katrina (and whatever regional stuff we have), we have been through much worse than that in modern history.