when soemthing this broadly painful happens at a company of Google's scale --typically you have something like a hundred people internally that all got paged.

There's no reason for service credits to tied be to the dashboard and not to determinations made after the investigation is over.

The SLA guarantees a certain level of no problems. The dashboard officially says there's a problem. This creates liability.

They should have pro-active monitoring system and update status page automatically when it detected disruption. Especially when you account to it's extremely hard to get human supports from Google because they automated it.

I wouldn't be surprised if, at Google's scale, something or other is disrupted all the time.

I think I'd prefer a status page that reflected that, or even no status page at all with an explanation, rather than a lying one, though.

Google has multiple internal alerting systems and people are aware of any disruption/delay/anomaly from the minute it happens.

The on-caller for the specific service decides on how to produce.

The status dashboard is something which will be (manually, yes by hand) updated by an operations employee, who is a couple of layers behind the actual SWE/SRE who gets the page.