Point of clarification: us-east-1 is an entire AWS Region, which contains multiple availability zones. Multi-AZ setups in AWS are generally fairly straightforward, multi-region generally isn't.
...that said, one of the key techniques most people use for failing over between regions is changing DNS, which wouldn't have worked with Route 53 in this instance because its control plane is in us-east-1, so it's not like AWS looks spotless even in this analysis.
...that said, one of the key techniques most people use for failing over between regions is changing DNS, which wouldn't have worked with Route 53 in this instance because its control plane is in us-east-1, so it's not like AWS looks spotless even in this analysis.