[tatersolid]

Wildfires, hurricanes, tornadoes, blizzards and ice storms, earthquakes… many regional disasters are temporary but it can take very long to bring everything back online. AWS can also always lose a whole region for an extended period due to software and control plane bugs.

Even if all your apps and data stores are active-active multi-region you can be in a world of risk with no DR for a long time if your DR region fails. If your data size is small that vulnerability window might be small but if you’ve got petabytes you’ll be without lifeboat for a days or weeks until you can take another “full” DR copy.