From a critical perspective, your comment made me think about the risks posed by rogue IT personnel, especially at scale in the cloud. For example, Fastmail is a single point of failure as a DoS target, whereas attacking an entire datacenter can impact multiple clients simultaneously. It all comes down to understanding the attack vectors.
Cloud providers are very big targets but have enormous economic incentive to be secure and thus have very large teams of very competent security experts.
That doesn't sum up my comments in the thread. A rogue actor in a datacenter could attack zillions of companies at the same time while rogue actors in a single company only once.
