Is anybody actually using M-DISC ?? If so, why? And where are you getting the media at a reasonable cost?
The disks are prohibitively expensive. Anything being stored on media other than M-DISC should last long enough as it is, or at least until standard media is near obsolete. It seems like a good bet that when standard media is no longer readable we will probably not be using current storage methods very much anyway. Most people have already moved on from optical storage.
So why put the money into M-DISC media when cost is so extreme and standard media is relatively inexpensive, especially if you take good care of your disks? It doesn't make any sense.