That's def another way of doing it. That way Roland could continue to make the traditional arranger to cover the standards.., but offer an expansion card that would had a whole slew of modern styles and patches. It could be done.., if Roland WANTED to do it.
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.