USA still hasn't adopted the faster payment model of same-day payments between the banks (without charge). Compare that to the UK which most payment transactions are completed within 4 hours
US is archaic in many ways too: the necessity for paper checks in many situations (and still having to pay for them in many banks), no contactless payment cards, the aforementioned dire signature/chip situation... It's certainly anything but at the 'forefront of digital technology.' Not to mention fees. Fees everywhere! The effort it takes to avoid meaningless 'gotcha' fees is just insane -- and must surely stifle innovation too, in creating friction against change.