i may be wrong,

but i feel yamaha leaves things out on purpose...meaning they probably could have given us Motif XS drums, but why? let us buy the T3 now, and then come out with yet another arranger downs the line,

you see give us a little, we upgrade, they make out $$$

give us a little more (T4), they sell, $$$

i truly believe they , and MOST other makes, Roland, Korg, etc, can give us that TOTAL ARRANGER, but why do it? then they would only sell once to everyone, cuz nobody would have need to upgrade...