If you want to look at the greater issue -
Power generation, transmission, and distribution assets require hardening. Hardening can take many forms - and is usually referred to as “resiliency” vice “hardening”.
Resiliency measures may include shielding, logistical measures, spares/training measures, alternate communications measures.
There are lots of things to be done. Civil infrastructure is critical infrastructure - particularly power, water, and water treatment.
But as of this moment, we do not have a complete understanding of infrastructure damage to be expected (could be a little, could be a lot). We don’t know how vehicles will be impacted - especially late model vehicles.
You may well be right - that one key capability to getting things “up and running” will be the ability to replace components on a board, in some instances.
Ever read any of EMPact America stuff?