So, if these Wersi's are so good, why does most of the music I have heard played on them by people OTHER than factory demonstrators sound so bloody awful?

You know, I bet that the vast majority of drivers that bought a Bugatti Veyron aren't capable of driving them safely at the 250mph+ that they are capable of reaching. In fact, check out the googles, and find shot after shot where owners wrote them off at quite modest speeds!

The point being, although it might be POSSIBLE to make great sounding music on a $20k+ Wersi, seems like few actually do... Personally, I think it is the complexity of the VSTi system that is the primary roadblock. It seems, in demo after demo, that users of TOTL all hardware arrangers don't seem to have much problem posting something quite impressive as soon as they get one. Wersi owners?

Crickets chirping.
_________________________
An arranger is just a tool. What matters is what you build with it..!