I guess that makes sense, but the cheap USB drives you find on Amazon are of recent manufacture, so for some reason it makes sense to keep making them.
Lots of legacy systems, industrial machines etc. still use 3.5" floppies, so many people will still have a need to write them with modern computers to transfer stuff to these machines. My mom actually has a fancy sewing machine that uses 3.5" floppies for patterns and she uses a usb floppy drive to write to it.
How else do you expect me to download pictures from my Sony Mavica /s
Oh, man, I remember when that was state of the art and everyone in the computer art department would sign up weeks ahead to get a day's use of it and fill that disk with like 12 images.
When was this? 1997.
It might have changed by now, but at least a few years ago 3.5" floppies were still used to exchange crucial information in the health sector here in Norway.