How cool would it be if Korg and Yamaha produced a TOTL module? Heck, you could own them all for the price of just one TOTL keyboard.
Hammer
I think it would great if Korg and Yamaha made modules, even if they were based on the mid-range instruments.
I doubt if it will happen.
I think what Roland has done (and they are masters at it) is to find a segment of the market that will probably only sell enough units for perhaps one manufacturer to fill...then they fill it before anyone else does. Ketron's module is far too expensive to be any competition.
I also believe they were getting a demand for a module from their
accordion division...that's how the RA-series got started many years ago; because of accordion players wanting arranger features. I remember meeting accordionist Luigi Bruti, many years ago, when he did a clinic on the RA modules in Toronto...Luigi also helped to create Roland V-Accordion. Awesome player.
Ian