The lack of sales of a 76 key Yamaha 9000 pro or the out selling of a subsequent 61 key Roland arranger over its 76 predecessor, can not be blamed on the 76 key factor.
There are lots of other factors that make the difference (like sounds, OS, ease of use, styles and so on).

Also, to suggest that the only reason for a 76 key keyboard is for full piano mode clearly demonstrates a lack of understanding of the value and use of 76 keys.

A person would want a 76 key arranger for the same reasons that a person would want a 76 key workstation.
In addition to those reasons, specific to an arranger, a person would want a 76 key arranger so that
1. they could have more left hand room to trigger full 3 and 4 note chords. You may be able to barely get by with 61 keys but why should we the players always have to make major sacrifices and adjustments because the manufacturers (who probably don’t play as much as we do are trying to cut corners).
2. When playing in style mode, you have more room to have more than one sound in the right hand. You can have a split in the right hand. So if you want to have brass licks in between a melody (if you are doing instrumental playing) you can do that with out having to change sounds while you are playing.
3. Having a 76 give you more flexibility on a gig to be spontaneous. You don’t have to pre plan to take a 76 key controller keyboard if you want to play using 76 keys. Again why should we have to pay so much for an arranger and still have to make all these major adjustments and sacrifices?


Maybe if Yamaha do some real market research and stop looking for a reason to justify their already made decision to not make 76 key arrangers, they would see the value and the money in a 76 key arranger.

Seriously, how much more cost and size would have had to be added to a 76 key PSR 900?

And how many persons, if the PSR 900 were 5LBs more and $100 more and had 76 keys would not buy it?

Can persons say that they don’t want 76 keys because it annoys them or that they have a natural dislike for 76 keys?