Somehow I highly doubt anyone will leave AWS over this unless their use of AWS is way more low-complexity than the average account.

People make similar pronouncements after every us-east-1 outage makes the news, but I feel like AWS would be going out of business by now if people followed through.

It reminds me of airlines, where after a particularly grueling irregular ops experience, a few dozen people file off the plane swearing "Never again, <airline name>!" but really, we all must know deep down that the airlines are all subject to the same external inciting factors, internal profit motivations, and human imperfection, and thus all pretty equally likely to cause us a bad day or ruined trip. The effort spent to avoid one isn't really worth it.