It’s important to remember that over time systems develop complexities that can be hard to recover from scratch because by definition air gapped data aren’t ones you are regularly exercising. Here’s an example of this in action from Google’s history
>It took an additional hour for the team to realize that the green light on the smart card reader did not, in fact, indicate that the card had been inserted correctly. When the engineers flipped the card over, the service restarted and the outage ended.
https://google.github.io/building-secure-and-reliable-system...