For sure it's impossible to cover everything considering the size of their country, you are absolutely right about that. Residential stuff and infrastructure is the so-called "2nd class" when they think about covering military tech, infrastructure, etc.
It would be kinda interesting to know what would happen if EMP would hit some of these high-military powers like the U.S, Russia, China, India, Iran, Pakistan, Turkey or South Korea.
What would they do? They can't inform their citizens.