Earlier quoted context omitted.
>From an operational and strategic security POV, cash is a vastly superior technology. It doesn't need electricity, a network of cables, satellites and routers. If the power goes out, I can't get any cash. I don't keep any meaningful amount cash on hand and neither does anyone I know, including my elderly relatives. Most of the stores I shop at won't actually be able to sell me anything, because none of the products…
It isn't just for infra failure. When your credit card provider cuts you off for "unusual activity" that they won't go into detail about, and you realise they are free to refuse you business as they feel like - you'll appreciate cash while rushing to find a new provider as existing debts still loom.
Maybe my experiences are atypical, but my impression is that consumer banking in the US is quite dysfunctional.