3M is only interesting in retrospect. They were one of the first manufacturers to get out of the floppy business, but they also had some of the highest quality disks. So as soon as floppies started dying, the durability and quality fell off a cliff. But if you come across a 3M disk in the modern era (floppies are still used by textile equipment), it might actually store your data without breaking.
The article points out how Imation was eventually bought out just for the trademark, so it sounds like they gave up on the manufacturing / material science and just became like any other floppy disk.
