[hodgesrm]

I'm not sure I understand the argument against reverting state. If you are cleaning up any sort of mess--including getting hacked--it's vastly easier to start with a good before-things-got-messed up state. This is one of the reasons people buy expensive storage arrays that support fast snapshot reversion.

Also, the author is arguing fix now but preserve all information for fault diagnosis later. For a lot of problems that seems like exactly the right choice.