I'm not 80 but do have a backup credit card and debit card and I do travel. So it's not so much "daily basis" but I do have a handful of cards that I keep with me.

In my house we have two businesses [1][2] so that adds two cards. You may also have a card for medical expenses that can be reimbursed with a FSA/HSA or a prepaid debit card that you got as a gift, etc.

[1] don't tell Mr. Fox he's running a business

[2] ... and will probably be adding a third