There's a lot of pitfalls. You have to diligent about stuff like making sure you're using region-specific endpoints like sts.us-west-2.amazonaws.com instead o

There's a lot of pitfalls. You have to diligent about stuff like making sure you're using region-specific endpoints like sts.us-west-2.amazonaws.com instead of sts.amazonaws.com. And some services, like Route53 and Cloudfront have built-in dependencies on us-east-1. There's also internal dependencies that are sometimes not obvious until an outage occurs. Though, as you say, none of that's a great excuse for Amazon itself. I know Alexa devices, Ring Devices, Prime Video, imdb.com, etc, also all had issues in the first hours of this outage.