Wow >31h I am surprised they couldnt rebuild their entire systems in parallel on new infra in that time. Can be hard if data loss is invokved tho (a guess). Would love to see the post mortem so we all can learn.
I doubt it’s infra failure but software failure. Their bad design has caught up and they can’t toss more hardware for some reason. Most companies have this https://xkcd.com/2347/ in their stack and it’s fallen over.
