It's no magic given the size of us-east-1 there is no spare capacity to absorb all the workloads
One of the SRE tricks is to reserve your capacity so when the cloud runs out of capacity you're still covered. It's expensive, but you don't want to get stuck without a server when the on-demand dries up.
alt Hacker News
One of the SRE tricks is to reserve your capacity so when the cloud runs out of capacity you're still covered. It's expensive, but you don't want to get stuck without a server when the on-demand dries up.