I always used to carry a wallet, but when traveling to southern Europe or Latin America, I didn’t. I always thought that a wallet is a great convenience for pick pockets! Instead, I distribute cash and credit cards (the minimum necessary) in four different pockets, and I’m done with it, no wallet needed.
For the last couple of years, however, I no longer carry a wallet here at home and I don’t miss it at all! I carry my DL, a few credit/debit/ATM cards and occasionally a little cash ($0-$20) in my pants’ left rear pocket. On the right rear pocket I carry a (dumb) cell phone, a comb and a handkerchief (I’m old school).