"Uptime for current quarter: 99.97%" AFAICT, this outage has been going on 6 hours and is still showing a ton of services as "Incident" status in the slack status page. Seems like uptime could be more like 99.7% and dropping.

But, how do out count downtime of a distributed system? We probably need a new way of discussing availability.

An outage to part of your system might only impact one or a group of users, but to those users you could have been 100% down, effectively, even as other users were not impacted at all.

So maybe a series of user/%age counts? "This quarter 90% of our users/use cases had 100% availability", for example. With the gold standard being 100/100. Maybe numbers for 99, 90, and 50% of users/use cases? IOW: "1% of our users had 95% availability, 10% of users had 99.9, and 50% of users had 100%."