OF COURSE Yamaha could have EASILY allowed SA sounds in multipads. They could probably just as easily allowed Organ Flute voices in a style or multipads, too, especially if you weren't using the engine for keyboard sounds (I know there is probably a limitation to how many Parts this engine can play, but if you aren't using it for keyboard sounds, it's available...)

But how are they going to get you to sell your T4 and buy a T5 (and then the T6, T7... T1000) if they do?