Using GCE as an example [0], it’s per-customer, but all instances in multiple zones have to be unavailable. You could have 99% instance failure and not qualify.

Using GCE as an example [0], it’s per-customer, but all instances in multiple zones have to be unavailable. You could have 99% instance failure and not qualify. >Loss of external connectivity or persistent disk access for all running Instances, when Instances are placed across two or more Zones in the same Region. [0] https://cloud.google.com/compute/sla https://cloud.google.com/compute/sla