I have a differnt 'take' on the lack of arranger sales in the USA.

The "pro Yamaha" instruments came first to the USA and were very successful (DX7, etc).

When the arrangers first arrived, they were, correctly, viewed as consumer 'toys' and marketed only thru mass retailers.

Later, when the arrangers became serious instruments, the pro outlets did not offer then. Why, I do not know. But perhaps their earlier reputation, or perhaps inter-company competition, was a factor. The fact is that there is minimal distribution for these instrument in the USA. In my view, that is the major factor for the relatively poor showing in the USA. Few people will spend thousands for an instrument that they can not touch!

Just my guess...

Regards,

Michael