Australian here, like the author. Apple Pay (and equivalents) work _everywhere_ here, including at the tiniest market stalls, and for the smallest purchases. I stopped carrying my wallet the moment my driver licence was available on my phone, the last piece of plastic I was mandated to carry around.
While the paranoid nerd in me might occasionally wonder about all my spending being tracked, watching someone fumble with magic pieces of ~paper~ plastic and metal in a supermarket now looks as quaint to me as someone taking their pig to market to exchange for some eggs and bread.