It will go at the speed of the slowest common denominator. Lots of shops are run by older people who will resist adopting any kind of technology unless absolut

It will go at the speed of the slowest common denominator. Lots of shops are run by older people who will resist adopting any kind of technology unless absolutely necessary (and it won't be necessary until people stop carrying cash, kind of catch 22). Not to mention weed dealers and "cash in hand" types. Plus making sure everyone has NFC phones (including people coming from overseas).