They know from their research and from past experiences, the market for arrangers just have to have the newest and latest arranger and price is not an option.
Yamaha certainly fall into that category to me with their incremental upgrades in each model. They have this down to a fine art at this stage too which is why they are the biggest arranger keyboard manufacturer in the world.
The secret sauce to making Yamaha arrangers is based on two things.
1: Knowing that the majority of arranger users cannot program, nor do they have any interest in doing that or creating their own styles. Because of that it's easier to make the keyboard simple to operate and so the focus should be on making it sound fantastic out of the box and give enough to allow users to customise the keyboard so that they can access what it offers quick and easy. In other words it's all about the short term wow factor.
2: Because of number 1 above, the same people will never notice that each keyboard only offers an incremental upgrade because when Yamaha add something like MEGA Voices these people see this as an entirely new feature and not what it really is, just an updated sample library that could have been sold for $100 to them.
If you were to tie down the average Yamaha T3 user and to show them how much more a KORG Pa2X can do that the T3 can't, they would just switch their brain off because they don't understand all the technology and how far everything has moved on.
Oddly enough, this is what the majority want, which is why Yamaha are the biggest sellers of Arranger keyboards in the world.
My 2 Cents.
James
[This message has been edited by Irishacts (edited 08-15-2009).]