With respect, not quite true. Yes, some countries, like the UK, are trying to go cashless but here in Siem Reap (Cambodia) new banks are being constructed and existing ones being renovated. There are also several newly constructed "multi-bank" ATM kiosks around town, in fact my bank, which was recently redecorated, has just opened 2 more new ATMs in the city. Cambodia does promote digital payments but cash will be available for a long time yet. I pay in cash, especially at the local fresh produce markets where cash is "king" or by debit card in the supermarkets. So, where do I get cash from? - banks and ATMs throughout Cambodia. I do not own, or intend to own a smartphone. I cannot use them due to finger disabilities.
Photo of my refurbished and redecorated bank (2023). Also note road improvement to show new pavement(sidewalk), white lines and a pedestrian crossing!