Earlier quoted context omitted.
I used them in whole foods all the time
sincere, non-trolling question: Why? You clearly saw some value in the convenience. Smartphone and smartwatch NFC offers that convenience everywhere . Even setting up palm authentication feels like unnecessary work.
Set up once with the CC with rewards for groceries, hover hand 2 seconds, done.
Apple Pay in the phone or watch are super convenient as well, but they take just a tad bit more of time between selecting the menus in the touch screen for pay options, and then selecting the matching CC.
I save like 30s? Possibly. Is this tech overkill? Most likely.