Spalding... only some kind of blind faith in Yamaha's infallibility could lead you to this conclusion. I know for a FACT that Yamaha never, ever asked me... and, I would be confident in saying the VAST majority of 76 playing arranger players haven't been asked, either. They ever ask you?
If they don't ask the users of a certain type of product, what chance do they have of getting accurate figures..?
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An arranger is just a tool. What matters is what you build with it..!