Years ago, I stopped carrying my wallet everywhere. A mobile phone handles payments, so what’s the point of a wallet and a stack of cards?
A few cards can’t be digitised on my phone, so I simply tuck them into my jacket pocket. I don’t need them very often anyway, so keeping them all with me isn’t even necessary, but they’re very light, so it’s fine. I usually only have two or three cards in my jacket pocket, not the whole wallet.
Technically, I also have a wallet, but that just contains all the ancient relics I need approximately once a year. So far, I’ve just kept it in my backpack. I wonder how soon would I notice if I just left it at home.