Doomsday maybe too strong a word in this context, but if the situation escalates (which it can) and things do get worse than just the disintegration of the supp

Doomsday maybe too strong a word in this context, but if the situation escalates (which it can) and things do get worse than just the disintegration of the supply chain then you can forget about "modern life." Electronics (and even electric power, at a certain point) will be the last thing on your mind when all you might be thinking about is sheer survival. What will be really important is a piece of land, a closely-knit community, and a lot of ammo to defend those.