I was fortunate to watch one of our members put on a show, using regs. He planed at home, then put it into the keyboard.
The type of music has a lot to do with how the keyboard is set-up. Mack the knife Bobby Darin; (old great song) had volume changes, instruments changed, tempo SLIGHTLY changed, and so did the excitement. Bobby Darin changes keys 3 or 4 times. This cannot be done with one reg, or even three regs.
I use one regs with many of my songs. The Kn7000 was set-up one song, oe reg, I did not use a complete bank often.
Even back then there were Kn7000 players that used complete bank per song, I thought that was crazy.
Times change, music changes, and all of it is beautiful.
John C.