Once I made up a batch of little circuit cards that adapt the 8" drive bus to work with 3.5" controllers, and put up a dinky little web page advertising them at a price that would just about get me my money back (with nothing for my time) if I ever managed to sell all ten. Now it's twelve years later and I sold eight of them in January alone!!! Usually it's more like one a month but it absolutely blows my mind how many other retro-geeks like me are in the world.
Admittedly the users are mostly/entirely people like me who want to take snapshots of all their old disks for use under emulation, so that might not fit the definition of "using" them (since they'll stop once they have read everything).
It's kind of funny that CDs aren't considered antiques, even though they came out in 1982 so they're not that much younger than 8" floppies. I guess no one ever really thought they were too big (physically) or expensive so the upgrade path was just to increase the capacity at the same form factor and maintain backward compatibility (so it's convenient to keep using them even now, for things that fit). It was very odd that the first direction floppies went was to the 5.25" mini-floppies, which were slower and had much less capacity, instead of upgrading 8" drives to store 8 MB per disk or something amazing like that.
Anyway I'd love to know where the original poster thinks you can buy brand new 8" floppy drives. My Googling just turns up mislabeled NOS 5.25" stuff, and a blank media vendor whose page is copyrighted 14 years ago.