Hi Ian.
Just to balance the scales, Korg has been doing the very same...basically since the I-series
lol... I fail to see how you make that out where there were only ever 4 flashship arrangers.
i3, i30, Pa1X, Pa2X.
Now look at what flagship arrangers Yamaha released in the same time frame.
PSR-6000
PSR-7000
PSR 8000
PSR 9000
PSR 9000 Pro
Tyros 1
Tyros 2
Tyros 3
Tyros 4
That's called Milking the Cow.
Regards
James.