Works great for the Chinese, not so much anyone else. They really dropped the ball on that. I see local alternatives springing up all around the place. Grab probably will win out in South East Asia.
I'm quite used to contactless payments in Australia but work over there a lot and going back to card + pin is painful. I'd happily use the QR code payments given the chance but legacy banking is struggling to adapt.
Companies that prioritize this--Walgreens comes to mind as an obvious example--have chip auth under ten seconds. It isn't optimal, but it's improving.
Whereas in Australia, it is just "tap and go." Starbucks works similarly with their QR code buying (but the money is onloaded to a digital gift card; but then I never use it anymore since mobile ordering is so damned convenient).
(I agree it's less than ten, I just couldn't remember any off the top of my head that I felt confident asserting.)