Normally a media sensing floppy drive is a good thing...except for when you've got old 720K original distribution diskettes you want to make copys of so the originals can be tucked away safely somewhere and the copies used instead.
Finding a new 720K floppy diskette these days is near impossible, so one is forced to try this ploy using obtainable 1.44M diskettes. OK, so I put some tape over the hole in the 1.44M diskettes and got them to format as 720K. Problem solved.
But still, if I tell the format utility to format a diskette as 720K, damnit, I want it to try, not just quit and refuse to do it. At least ask me if I want to give it a whirl.
The tyrany of technology that attempts to be too clever can be very annoying.