This is all true, but it sort of presupposes competence.

Taking a full month to recover a downed social media platform isn't really acceptable, but it's still better than being literally unable to recover it at all. Spending a small fortune to ship hardware to an AWS datacenter and convincing/paying them to load it directly would probably also be worthwhile, when we're talking about simply losing a $500M company. If the claim here about "no backup" is true, it's so profoundly stupid that everything I know about best practices sort of goes out the window. Approaches that any sensible person would consider unacceptably slow and unreliable are still a step up from a completely blank playbook.

(I guess the theory might be that Tumblr is such a trashfire it can't be restored, or would lose so much value in days/weeks of downtime that there's no point in even planning for that. Again, I don't really know how you run cost-benefit analyses when it's not entirely clear the project has benefits.)