I used a few for my windows. Actual glass windows. They work as a stopper by wedging them in the track since they tend to slide on their own otherwise.
I saved literally every single RAM stick I've ever used (and more) minus two I gave to a friend. They're in a big ziplock bag tucked into the corner of a box of misc PCI cards.
I will almost definitely never have a reason to install RAM from the 90s...but they're there just in case...
Oh my god I got rid of like 5 cables like four fucking years ago and now EVERY SINGLE TIME we're missing a cable in the house it's "ah you threw all those cables out!"