Maybe Rikki hit the nail on the head... If the manufacturers make it easy to address external gear, we won't be in as much of a rush when it comes to upgrading to another arranger, and simply use modules to obtain more cutting edge sounds, if not OS features.

Hold on... I'm starting to sound like Donny

Maybe it's just that not enough of us complain about this issue to our dealers and reps, and moan enough about it here..! They sure added mp3 playback in a hurry after we all started asking for it...

Maybe it is in OUR hands...