In short, a debit card is definitely not guaranteed to be accepted unless you find one that still allows the keyfob/credit card-sized wallet card. You need to drive around to local chargers in your neighborhood to check them out.
Thanks for the insight! That's kind of exactly what I was afraid of. Call me a dinosaur, but I have very few apps, and every one of them is a convenience and not a requirement in my day-to-day life. I do not see my stance on that changing, and do not want to depend on any app for any purpose, especially one as important as refueling my car.
I think I'm going to end up getting a PHEV and kicking the can down the road, so to speak.