That was huge.

People today don't realize how much time was spent formatting floppy disks, and how slow the process could be. So slow that eventually companies started selling pre-formatted disks and charging extra for them.

OS/2 could give you back hours of productivity each month simply because you could do something else while formatting a disk.

The problem was Windows handling of interrupts. Until, i think, Win2k, generating a lot of interrupts (floppy, parallel port, high network activity) will slow Windows to a crawl.