At worst we get tossed back to 1900 ~ and electricity will be back on line quicker than snot. Just rebuild the generators and transformers. The other stuff ~ consumer electronics and appliances ~ they’ll take a while longer, but it won’t be stone age.
I truly hope you are right. My information is from publications in the mid 2000s, and “One Secondn After” which I am in the middle of.
Evidently the US doesn’t produce transformers, so much of our recovery of the grid would be foreign equipment, and the timeframe was “years to decades” with isolated areas of power where possible.