> It is much different than having to sit in the car in the middle of the night to change a hard drive in the server that just failed because of a power surge.

Never ever had to go at night in a data center to replace a single disk failure, even in my DC days. Always the 1st working day after the disk failure, since they were redundant. Now, network gear upgrades during the nights, those I made a few and I'm happy they are history for me now. But even in a cloud world you have to do from time to time low-traffic time interventions.