It's a LOT tougher selling a keyboard if you price it out of reach, AND don't have it anywhere for people to look at.
But your form factor argument ignores an important point... What was one of Roland's most popular arrangers ever? Yes, the G1000. No speakers, 76 notes, 38 lbs.
If these things were TRULY a detriment to arranger players, then IT wouldn't have been popular, either. But it was, and still remains one of Roland's best arrangers. Why was it SO much more successful than the G70? I honestly believe my pricing and availability issues are the REAL reason, not that, all of a sudden, all those G1000 fans decided that they really DID need speakers, and a lousy 61 note keyboard, and suddenly were incapable of lifting more than 25 lbs!
And your reference to 'pros' not wanting to use arrangers at all ignores the MANY, many working ARRANGER users out there. Are we not 'pros'? Do we not need keyboards built to WS quality? Pros come in all flavors. Sad to say, Yamaha arrangers DON'T.
Like I said, Ian, just be grateful that Yamaha have their MARKETING a lot more together than Roland. Or you would have to sit and listen to US tell you the reason PSRs are not selling well is because of the shoddy construction... while all the time knowing that if they were just MARKETED right....
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An arranger is just a tool. What matters is what you build with it..!