haha I feel you, I have also had people bring in just for show, their original obscure agency cert cards that are over 30 years old. They were entirely handwritten on plain paper, with a cut out photo pasted in, then laminated with packing tape. Looked pristine. Its all about how you treat it i guess. Of my cert cards, i usually carry just my nitrox card with me unless im doing a dive that requires more advanced certs. As such, my nitrox card, about 6 years old, has a lot more wear and tear than my other cards that are older. Still works though, all the info and my picture are clearly legible.
I also have pictures of my certs in my phone. So i plan to never replace a card again. When it goes it goes. Lost, damaged, or otherwise.