I wonder how it's possible that these kinds of--I assume--easily preventable problems happen at huge corporations and projects.
I routinely renew certs for clients and it never happened that a website was down because of an expired cert.
I would think that Apple, Microsoft, Mozilla would be more efficient than me in avoiding these kinds of fuckups?
I also bet these companies make huge investments to their infrastructure so that their services have a near-100% uptime, and then they let certs expire.