I'm 39M and have ended up with a bunch of different credit cards; I get annoyed picking between them even without the additional complication of them being identical in appearance.

For me it's my daily driver, my Costco branded card, my airline's amex card, my USD denominated card, and my work-issued card. There are also two ATM/debit cards in there which I'll occasionally choose at small merchants where I know the CC fees hit them harder.

In most cases I just want the daily driver, but the airline card gets good rewards for dining so it does come out reasonably often as well. The USD card I can mostly ignore unless I'm traveling there and can temporarily set it as the default.