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One of the issues barely touched on is the penetrations and jonts in a building or space to be protected. Doors, windows, eaves, wiring penetrations, ductwork, pipe, fire protection, sanitary sewer, storm drainage and downspouts, hinges at door frames, knobs and other thru-wall details, and a host of other items play a part in allowing RF into areas to be protected from this issue.

I agree with you.

That is the one area that is stupefying. My opinion is the economical way to protect against E1 is to take an inventory of the most critical devices and then to safely store parts for repair or replacement. I have read where line of site protection with distance can be accomplished without turning an entire house into a Faraday cage. A very competent engineer I know argued that placing a shield in the attic would mitigate most of the line of site E1 damage (based on proximity to the initial burst). I'm still not sure about that.

I just don't think it is economical nor physically possible to retrofit an existing home. E2 is easy because with do that everyday with plug in protection devices. Even the effects of E3 are solvable with a few spare components.

I just not sure I would want to live in a home that has 24 E1 protection. That would require quite a change in lifestyle and be more costly than stocking up with replacement parts.