It has to be around 50% of the time that Apple Pay does not work. Either the NFC system is down or the terminal isn't happy with my payment (gas pump informs me to go to the register inside when the physical card clears flawlessly). So as a whole, I'm still swiping my card after a failed NFC attempt around half the time, which always frustrates people in line behind me and doubles the check-out time. Also, Wal-Mart does not accept Apple Pay which is unfortunate in the rural south. Don't get me wrong, when I go back to NYC or similar areas, I can hop out of my uber and pay for a Lacroix at Duane Reade using Apple Pay before I use Apple pay to provide a gratuity at the local coffee shop. I'm sure time will improve this, but it has been years and it's still it's hit more miss at best.