This question just occurred to me, and I'm just asking to challenge my opinion on this topic - it's been a long time since I did much with floppy disks, but I always had the feeling that HD floppy disks didn't seem to last very long when used in Amiga (DD) floppy drives. Is this a complete load of rubbish?
Of course I understand that the full capacity of a HD floppy disk can't be used in a DD drive, my question is just about reliability/longevity.
I always found pre-formatted 1.44MB disks would frequently failed to format right away on track 0. What I would do is DMS a disk image to it. After that it would reformat just fine. I have no idea about the longevity.