Sorry, Donny, but the music of the 30's wasn't made on an arranger, either... In fact, NO music on the radio at all is, was, or probably ever will be

It doesn't stop an arranger from doing older music well, because it has the sounds and styles appropriate for that music currently in it. But they would do today's music equally as well (or as badly, depending on your point of view!) if voiced and styled for that format.

The whole point is, yes, a WS is probably what the music was created on. But it wasn't created in realtime, it isn't performed in realtime easily on those WS's, and even modern hiphop and rap music has intros, verses, choruses and fills. Despite some chord recognition starting to cross over to WS's like the MoXS and M3, etc., they are STILL quite inferior to an arranger at the basic control of song creation, live.

But because the manufacturers balkanize the lines so rigidly, you never get to actually see what a well styled modern arranger COULD do if the sounds and style teams were not mired in the eighties. I say put the same teams on arranger style design that design the arps for the modern WS's (and arp is nothing more than a different word for a style Part), and you would SEE what squeak is talking about.

In the meantime, just try to find an original DJX. Listen to how contemporary it sounds (despite actually being MUCH older than your S900). Then imagine something contemporary like that... If you were a younger player of live music (rather than a bedroom laptop jockey) you would be all over these.