WWII didn't destroy Germany or Japan. It simply set them back.
Frying the electronics of several American cities is not going to put us into the stone age. We aren't as fragile as you think. People (again excluding inner cities) generally rise to the level of what is required of them to survive.
It's not my thinking. Why won't you read the link? It's the Heritage Foundation, not Art Bell.
No one is saying people wouldn't survive, but you seem to be hanging on detail.
Sure the British Empire still "exists," but does that mean the same thing as a century ago?