Disklavier

This thread was started by another purchaser who was surprised to 
discover that a Disklavier cannot read MIDI files from CD and that 
MIDI files can be written only to diskette.  I'll observe that:

1) Yamaha makes the finest reproducing pianos in the world, with its 
Disklavier and Disklavier Pro lines.

2) Yamaha makes the finest CD writers in the world, such as 
http://www.yamahamultimedia.com/yec/products/cdrw/crwf1.asp

Yamaha clearly has excellent engineers and programmers who understand 
these hardware technologies well, along with the software drivers 
needed for each.  It would seem that the parts cost of their CD 
writers, within the same company, would be low.

Gosh, it seems reasonable to ask that these could come together: 
Disklaviers should have CD-RW drives that can read and write MIDI 
files.  What's the right way to encourage the development team, since 
the limitation seems to be neither technology nor cost?

Thanks - John Q.