I'm not sure I get the same impression about Yamaha as you, Kingfrog...

To be honest, their OS has FAR more complexity and capability than Roland. There are many, many features that are hard to classify as anything but 'pro'.

Synced styles and SMF's (how many 'home' users use this?), detailed voice editing (not exactly KISS), complex rootless 'jazz' voicings (ditto), samplers (on the T2), and much, much more...

NONE of these exist in Roland's. Theirs, I believe, IS the best 'home' OS, KISS to the max! It drives me crazy seeing all the power in the PSR OS, while it is tied to a REAL 'home' keyboard, in sound (not very 'live') and construction. Heck, Roland's can't even store a User Tone... But Yamaha can

At the moment, I believe the Korg is the only TRUE arranger WS crossbreed. Sampler, User everything, 76 keys, 'live' sound, just about every bell and whistle there is (except Mega and SA voices).

But second in the depth of OS detail is Yamaha, no doubt. It doesn't SOUND like a 'live' keyboard, with a FAR more 'home', mastered and polished sound, but it has by FAR the more complicated and capable OS. Roland actually specialize in making style editing, creation and SMF editing EASY. These are FAR more complicated to do on a Yamaha...

Now if only I could tie the Yamaha OS to the Roland sounds... (but keep the editing stuff from the Roland!)