Yes, Yamaha does things their own way, which of course, they think is the best for their purposes.
I think the higher prices of Yamaha's arrangers (as opposed to workstations) pay for the R&D.
I've played the Motif (and the Fantom G) many times, and they have great sounds, but, since they don't have enough arranger features/functions for my needs, I'm quite content to use the Tyros3/PSR-S900.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.