What's wrong with floppies?
I started using them again earlier this year off and on after finding an iomega external usb drive for a few dollars. It allowed me to pick up a few games and test an existing copy of one game I've had in the bottom of a box forever. GoG doesn't always get stuff, and the lame abadonware sites sometimes lack stuff or at least working copies of things too. Spare floppies would have a use if you had one of those old games and one of them died of old age, you could recover the disk online then copy back to the replacement disk.