>> I actually do have some first-hand experience with the topic <<
Well, back in 1966-67, my job occasionally involved studying the effects of nuclear weapons, and EMP was a well-known phenomenon to us even in those long ago days of yore.
But I guess I wouldn’t claim “first-hand experience” unless I had been somewhere like Johnson Island during the test explosion in 1962 that some people think made the street lights flicker in Hawaii.
As I said, I have some first-hand experience with the subject at hand.