"BASF haven't made floppy disks for some 20+ years."
My understanding is that 3.5" floppies were last produced in 2012. I don't know what brand, but a few years ago, I bought a bunch of boxes (from Staples of all places still had them). There is an industrial instrument that I repair and calibrate. Its primary method of allowing me to get a test data calibration table file off its hard drive is via a 3.5" floppy. Also setup files. other than from the hard drive, can only be load from floppy. The bad thing is because of some special software you can only put one setup file per disk. It's not space, but when you save a setup, two files are saved. Only one had a unique name, the other file is a common name (used by all setup files) and that files contains most of the unique setup parameter. The name file is only for the directory display. Stupid instrument software. So, that's not a problem keeping 20 floppies for 20 setups, the big problem is keeping 20 floppies that can be read by the instrument (never an issue) and read by a USB-Floppy drive. Those "newer" USB-FLOPPY drives are very picky to which floppies they work with.