Then you're missing the point.
If they succeed they may well not be reversible. The question is if this had succeeded would we have shrugged it off again or responded appropriately?
I wasn't commenting on any particular case. I was stating that flipping a switch is less costly to reverse than blowing up a dam.
Can you give some examples of? I can imagine that under the right circumstances you might succeed in blowing up some transformers or even a turbine, but it seems like you’d be up to speed within a month or two on the outside? Or am I missing the gravity somehow?