Vending machines are shipping with a single coin slot, a dollar bill validator, and a credit card reader (some with tap and pay).
Juke boxes around me have no coin slot, a $1, $5, $10, $20 bill validator, a credit card reader, and on-line pay options.
Arenas, stadiums, concert venues, theme parks, etc. are going completely cashless.
Why are we so hard-headed in our thinking? We build the latest technology into the games, then resist the change that could actually help us improve revenues.