I think you missed the point. The reason military organizations are planning for operations the old fashioned way is because of the potential or likely disruption of cyber networks. (Read: GPS)
If cyber warfare expands to the economic instrument of national power (that is very likely) not only will the cashiers be counting change but the old fashioned cash register will be back in style. Remember writing hand receipts from a pad?
I would not get comfortable using the credit card network. Plan on cash. At least for a while anyway.
I know....I am a doomsday person. Personally, I always plan for the worst and hope for the best.
“Plan on cash. At least for a while anyway.”
I do and keep a good supply of currency and coins here, “just in case”. I don’t want to have to barter ammo. Of course if the whole thing goes down, the currency can be used for one other function so keep a lot of ones!
My favorite bill by the way is the $2 note. Whenever we get a youngster about, I take the time to explain what the portrait on the backside of the bill is about as I present them with it.