We likely won't even have an internal post-mortem for at least a couple weeks. There's no way you can possibly expect a full breakdown of what went wrong at this scale less than 24 hours after it gets resolved.

Google managed to put one together in a little over a day: https://status.cloud.google.com/incident/storage/19002.

Expectations are vastly different for a business-focused hosting platform with SLAs than a social network.