Probably, but it doesn't protect you against bad edge cases, like screwing with your own mind so much that you no longer can or want to activate the backup.
Kind of like when you could set your screen resolution to a value that wasn't supported by your screen and it didn't reset automatically after 30 seconds.
Those are interesting issues. The answer, I guess, would be to only work on copies. But even then, nuking a copy of yourself would be troubling.