Don't confuse the check wielding Americans for the "west", for example Sweden/Norway/Finland has similar systems named Swish/Vipps/MobilePay (Phone number based with scannable QR codes,etc) that's taken over between people and smaller merchants (even young people organizing raves use Swish payments on-site despite it being potentially traceable) and the banks/companies involved in those services are now in the process of building cross-national support that probably will let other countries join soon.

I think the main takeaway is that phones and capable app ecosystems was a "hidden" disruption enabler vis-a-vis the traditional credit card processing companies that various actors in various countries has taken advantage of now, the big question is if/when they will make this internationally interoperable (considering the trouble foreigners in Sweden has with being excluded from these "easy" payments that at best requires a card or at worst cash it's an area that needs fixing).