Totally impractical for any small business and of questionable usefulness for large ones. You'd be giving up the largest benefit of platforms like AWS--ready to use services for common tasks--to avoid the infinitesimally small chance of AWS having some doomsday global outage.

To answer the original question: It looks like this issue was just a UI bug that affected the console, the service itself wasn't impacted. Events that do impact the service will be contained to a region, meaning you can mitigate it with proper redundancy across regions, no zany multi-cloud solution required.