The US banking system is lightyears behind the rest of the world in banking, where they still use paper checks and transfers take multiple days. I show my family (who still lives in the US) my banking app and they gawk as if it were some magical thing they'd never even imagined. With a tap of a button in my bank account, I can split a restaurant bill in however many slices I want. Restaurants don't even split bills here (like they do in the US), someone just pays the full amount and splits it in the bank account.