Conversely, if you're in some co-location facility and they run out of space/cooling/power, then you might be painted into a very small corner for an extended p

Conversely, if you're in some co-location facility and they run out of space/cooling/power, then you might be painted into a very small corner for an extended period. This happened to several government customers because they all shared a common facility. Entire departments were squeezing blood from a stone because they had an iron rule that "no more servers", not even VMs... for years. In the public cloud, you can almost always just pick another AZ, another region, or another SKU. Because of how Spot priced compute works, a PayG customer will essentially always be able to provision something, somewhere.