> The architecture was built assuming infrastructure within AWS might fail.

From what i gather it was not. Or did you have a strategy for a 0-warning complete AWS service closure? Just imagine AWS closing their doors from one day to the next due to economic losses, or due to judicial inquiries into their illegal practices: were you really prepared for their failure?

The cloud was never data living in tiny rain droplets and swimming across the earth to our clients. The cloud was always somebody else's computer(s) that they control, and we don't. I'm sorry you learnt that lesson the hard way.