“Teams were expecting to be able to use Google Hangouts and Google Meet to manage the incident. But when 350M users were logged out of their devices and services… relying on these Google services was, in retrospect, kind of a bad call.”
The best lessons here are confessions. A risky load-shedding fix turned a YouTube outage into a cascading failure. In March 2023 a network failure ran six days and hit an estimated 70% of services. Google once dodged a major outage because an engineer unplugged a desktop before the change propagated. That was the big red button.