When I first started with wallets back in about 1965 I was enamored with leather bifolds having elaborate art, but they were made by my Grandfather for ME.
He passed in about 1972 so the supply dried up. Since I started going to S Korea in about 1989 I've been "stuck" on eelskin trifolds. Very thin by themselves and they usually lasted about 4 years before "retirement". My last buy of them was about 2002 ($4@) and I've used 2 or 3 up and have several left. I figure if I conserve their usage they will last as long as my money.
I have to agree with the "don't keep it in the back pocket". I usually wear cargo pants and they are ideal for stuffing a bunch of things in and the wallets last a LOT longer.
And I'm surprised "they" have not come out with a true "MASTERCARD" that one could load all the pertinent cards (like Lowes discount, insurance cards (health, vehicles), drivers license, credit, debit etc.) on digitally and have it universally accepted.