Thank you, a reminder to check our perceptual biases is always relevant. I don't think that it applies in this case, though. Shark attacks, train derailments, minor aviation incidents, et cetera, do indeed happen with regularity. But an email service outage that affects 450 million people, and a ground-stop order that affects every commercial flight in the United States, well, those are highly unusual events. Further, the very fact that they not proximately related seems to indicate (along with dozens of other indicators) that the foundations of our society are getting shaky, for whatever reason.

Thus, the reason I'd feel better if the two events were related, and the reason was an attack by malicious actors. Then, it would have a cause that was a one-off, rather than be part of a pattern.