I'm down to just a 4 card MagSafe wallet (credit/debit/ID/car key), but I'd love to get to just a phone. Sadly I'm sure Wisconsin will be another 5-10 years before supporting digital ID.
Many states require that you identify yourself (presumably full name and DOB at a minimum) to an officer upon request, but I don't think that means you have to carry the physical card, just provide your identity (which can be done verbally).
Yep, Kroger and Home Depot are the biggest stores I've been to recently that don't take tap-to-pay, but there are some other national chains.
Also recently: my neighborhood florist, doughnut shop, parking garage, and hamburger stand don't take tap-to-pay. I've never been to a gas pump that does, though they all have the logo for it on the front. Every time I've inquired, the people inside say it's not enabled.
Record stores are about 50%. The one I went to most recently, I had to show them how to do it.
But interestingly, my shoeshine guy does take tap-to-pay.
I always keep at least one backup card and some cash in my wallet. I recently had to make an emergency trip to the Walgreens at 5am, and its credit card/tap system was down. It was cash-only for about a week. Glad I had cash backup so my family member's health wasn't held hostage by a technology glitch.
Increasingly public transport supports contactless instead of tickets or proprietary NFC systems - notably the whole of London supports contactless and I've not used an Oyster card in years now.
I've also not seen a card reader that doesn't support contactless since at least 2015, possibly longer. I'm not sure, but based on how quickly contactless rolled out from 2007, I suspect they'd been adding support to the hardware a well before it was enabled.
I know everyone says it but USA really needs to do better. It doesn't make sense that this is so uniquely difficult to rollout there.