There were already plenty of “successors to the floppy” in the dustbin of history (floptical, Iomega zip, LS120, …). None of them was competitive as a distribution format, or at all once CD-R became widely available.
After using minidisk I was sure that LS120 would succeed. The formats of cartridged optical disks mostly removed the annoyance of scratched disks. Now the only place I see optical disks in a cartridge is at the library where they put some CDs in a cartridge to use in a special drive.
I was in college during the time, but I remember all of these digital art students had iMacs and these clear+blue FireWire zip drives they used to carry around between classes and home.
Yeah, and the MiniDisc was the only one that could have come close. Sony already had computer MiniDisc readers/writers, mass production with pre-recorded content, (fairly) large volumes.
They just never connected these things to each other. It could have been a great standard and we would have been plagued to this day with them. :)
In some ways it's even better than USB flash. There are no read-only flash drives, for instance. It's also a problem that you mosh "data" in the same port you mosh "keyboard" or "spy device". We gained a lot with the USB paradigm but we lost some things, too.