Our "serious" data (i.e. designs, sources etc.) is on dps machines only and a backup still fits on a DVD (would have no chance to do so if we were using outside design and programming tools). The USB HDDs are nice, we have several full of films and tv-shows we thought we might re-watch (and practically never did/do.... but who knows what is around the corner). The photo archive has grown larger than a dvd, it goes on a few bluray disks and on some of the usb HDD-s, plus some of it going to my dps hdd-s. I don't back the dps images to usb drives mainly due to a policy "no access to our designs for any alien OS", not that I have been that fixated on this but I managed to maintain it for decades so why now drop it.
The last time I accessed some of our floppies was some 10-15 years ago as I moved them to image files under dps (I also have an emulation of the old 6809 based machine which used these floppies). Interestingly some 10-20 year old floppies were readable but any attempt to write to them was damaging the sector write was attempted to.