Thing is, Dennis, what's the POINT of changing to a new keyboard, if all your backing tracks remain the same? If you think 'Drum part, Bass part, Guitar part, pad part, string line, horn line, etc.' and then you play one part, maybe two in realtime, you have changed at most 20-30% of your show... And have missed out on whatever better and newer the new keyboard could add to the backing parts (one presumes its' drums and basses etc. are better than your legacy gear)...

Sure, it's a boatload of work to do every time, but every time you do it, ALL your show gets better, not just your RH sounds...