Google knows the affected regions and probably has very fine grained data around this. I mean, they can even tell you metrics about your instances, they don't have monitoring on their own infrastructure to determine impact radius?
It’s a vastly complex problem. What servers were impacted? For what percentage of the overall outage was each server impacted? During that time, was the server offline or simply slower than usual?
And the part that even Google can’t know, even if they somehow can assemble all of the above: did it matter? Not all servers are created equal.
Small wonder they’re letting customers drive their own reimbursement process.
