The article more or less covers it. Asian countries without a credit card culture mostly transitioned to QR because it was easy with minimal equipment changes required. Those with widespread credit cards accept tap and QR (e.g. Taiwan widely accepts QR payments, Google pay, Apple pay, credit cards, and transit cards).

Since the western world has been on credit cards for decades that is the solution that is accepted there with QR payments being almost exclusively in businesses that have a customer base from Asian countries. Even then the US is odd compared to other countries since they never really adopted chip and pin.