Disklavier

Even if you could put the files on a CD and play them on the disklavier CD  
drive you would still be limited to 99 songs because that is the maximum number 
 that can be displayed on the disklavier readout. The same for a  floppy.
I also have my piano connected to my PC and it works great but more often  
than not it is easier to put in one of my favorite songs floppies, with 70 - 80  
songs, instead of wait for the PC to bootup. 
 With 4- 5 hours of continuous music on one floppy, it not a big deal  to 
plug in another floppy if you have time to listen to more.
So in short I do not see an advantage to having thousands of midi's on a  CD.
The main reason Yamaha added a CD drive is to offer piano smart and  
pianosoft accompaniment to the disklavier. A CD will typically only have room  for 8- 
20 songs when using these features.
If I could copy my Pianosoft CD's to my PC and play multiple song on the PC  
that would be great.