I held onto them for a long time, but moved to CD quite a few years ago and haven't built a drive into my PCs for the better part of the last decade.
What I find funny is how Sony talks about the 2.88MB disks, which were really rare as hens teeth. Almost everyone had 1.44MB and also those hacks that formatted a couple of the extra inner tracks and let you store a couple fractions of a MB more (1.8MB?)
Come to think of it, I wrote a program to format or test those inner tracks. That's probably one of the first utilities I wrote. I wonder if it's around on the internet somewhere. It was so long ago I'd completely forgotten and I have no idea how I did it …
But it wasn't very good anyway, and I think I used a 3rd party one.