Are you speaking of the AZ "show me your papers" law? As a white guy, I would so not carry ID. I can afford lawyers and a few nights in jail to make a stink about it, and others might not be so fortunate. But, of course, I'm not the target so it's easy to be Anonymous Internet Justice Guy.
Not that it would be a massive change in my behavior. With NFC payments and wearable communications devices, a lot of times I leave the house with nothing but an Apple Watch on my wrist (and at a minimum, running shorts; you're welcome). Dog walk? What am I going to buy in our suburban neighborhood? Go for a run? Same difference, though if I run by a 7-11 I can buy a Gatorade with my watch. I ass-u-me the EMTs know how to get my medical ID on an Apple device. Soooo, I kinda don't need a wallet a lot of times. Is it legal in the state of WA? I have no reason to believe that it isn't, but OTOH I don't really care. You want to know who I am? We have a legal process for that, at which time I will have my ID fetched.
Not that it would be a massive change in my behavior. With NFC payments and wearable communications devices, a lot of times I leave the house with nothing but an Apple Watch on my wrist (and at a minimum, running shorts; you're welcome). Dog walk? What am I going to buy in our suburban neighborhood? Go for a run? Same difference, though if I run by a 7-11 I can buy a Gatorade with my watch. I ass-u-me the EMTs know how to get my medical ID on an Apple device. Soooo, I kinda don't need a wallet a lot of times. Is it legal in the state of WA? I have no reason to believe that it isn't, but OTOH I don't really care. You want to know who I am? We have a legal process for that, at which time I will have my ID fetched.