Let me know when you have done that. And what you consider critical devices in your home. Air Conditioner? Spare PC?
Once you have done it personally, we can move on to business: Internet Data Centers, Medium Voltage Switchgear for most refineries, 15,000 Hp motors on pipelines...
i don’t discuss my personal preparations with anyone outside my immediate family.
I'd start with business first. Virtually every industrial motor 5hp+ has an electronic VFD on it (variable frequency drive). Electronic controls pump gas, supply well water, run refrigeration, sewerage treatment plants... Without food, water, and transportation with sewers backing up, dealing with personal computers seems rather trivial.