I understand that it's very normal to use a CC in Sweden (and many places), but it feels grim to me that the thought towards major telecommunications breakdown is, "oh no, how will we make sure that people can keep credit card companies and banks informed that they need food and medicine if the internet is down?" I feel like "reversion" to the solved problem of offline transactions - cash payments - would be a more reasonable default assumption, and in the case of catastrophic infrastructure breakdown, simple expropriation.