Disklavier

Hello all,  This is my first posting.  I have owned a Yamaha 
Disklavier grand for about 11 years.  It was made in 1990 and is 
about 6'.  It uses the control wagon and 3.5" floppy disks.  More 
specifically it is a GP series, Model DG1R, with a manufacture date 
of KM90.  The control wagon is a DKW10.  I had not payed any 
attention to the updates in technology until accessing this group.  I 
have just played and enjoyed this absolutely beautiful instrument.  
Is there any hope of upgrading, or should I just sit back and be 
quiet. I really don't have any particular complaints as it sits. Any 
information is respectfully requested.
Thanks,
Scott