" ... ---and it’s true that if the internet gets shut down, we’re all screwed, be it cardholders or bitcoin HODLers."
Don't forget about GoTenna, mesh networks, etc! It's turning out that the same Libertarian, survivalist folks who aren't willing to depend solely on governments for economic soundness, aren't willing to depend upon them solely for communications, or transactions either.
https://www.coindesk.com/gotenna-bitcoin-wallet-mesh-network/