When I visited Australia in 2015, I was really impressed with the ubiquity and speed of TAP to pay. We aren't quite their in the USA yet, but I do 90% of my payments outside using my Apple watch (with a bit of a lag that I didn't see in Aus). At least we aren't stuck using QR codes.
2011 was when I saw country McDonalds adopt contactless in Australia. From then it was a pretty quick adoption for it to be ubiquitous.
I'm currently on a trip back to Australia and I forgot my wallet (!!), but it's fine because I just use Apple Pay everywhere. It's never once been a problem.
