I don't know if it's possible, but I would like to see different polyphony on different "modules" within an arranger or a workstation. I think the Korg Kronos does this but with built-in soft synths running in Linux.

Within one board, you could have these...
128 Note Piano Module
64 Note Organ Module
128 Note String Module (Different Articulations)
64 Solo Instruments (Like the SA2 and DNC)
128 Note Synth Module (Other Sounds Needed)
64 Drum/Percussion Module

These numbers can be any thing that works. I have full orchestrations that sound very big coming from 32 note polyphony. I can be done but the multi layering is the problem. A string sound sounds very thick... but you are using 4 layered multi samples to make the thick sound. Put a few more fingers down and a sustain pedal and bye-bye first note!!!

Each one working on it's own polyphony system. They can even call it Multi Polyphony Systems... MPS!!

Memory is always getting cheaper! Be the brave company to break the "glass ceiling" of polyphony and give us power for our $4000-$5500 spent! Then spend your time supporting and upgrading the unit instead of replacing it every 2-3 years.

Be Brave and take the Leap!!!