Earlier quoted context omitted.
How frequent? I think the obsession with uptime is annoying. If GitHub is down, if there’s something so critical, then you need some more control of the system. Otherwise take a couple hours and get a coffee or an early lunch.
Frequent enough to interrupt the flow of an entire organization, wasting thousands of hours. Take a look: https://mrshu.github.io/github-statuses
But “waste” is arguable. If folks have literally nothing to do when GitHub is down, I question that a bit. For example, design, administrative work (everyone has that), lunch. You know?
Critical CI/CD can use Jenkins, but in that case folks might end up with 89% uptime!