Actually, Korg Ketron, Gem and Roland had arranger modules a few years ago, but that was when the concept of using arrangers for gigging was not as used as they are now. Some of the functions can be done on the controller keyboard if the user is not capable of using the buttons on the module in a live situation. People have used rac drum machines on gigs, and have done so successfully. So why not an arranger?

If this would be a major issue, Yamaha could even make it just a little bigger than a rac. But I still think that it would be a welcomed tool for the gigging one man band and traveling musician.

Why go through the hassle of logging around another keyboard when there could be a lighter and more practical solution in that of a module.