This is a bit alarmist. They are one of the biggest web hosts in the world, whole companies run on their servers and cloud without issues. Accidents happen and you always need to have backups, ideally in another DC.
They burned down two DCs, by the way. I advise to read analysis first as it shows utter blatant negligence when planning their DCs to reduce cooling costs, note the air tonnel effect "EcoRoom" design (at least the two DCs that burned down, but not limited to them), and operational issues like firefighters inability to turn off the AC, so they just stand there watching the firestorm.
