the cost is not the issue. that's like the tail wagging the dog. these instruments could be updated with software at minimal cost to the companies apt from the loss to profits .

The primary focus is profit and each time Yamaha , Korg or any other manufacturer pushes out another instrument, with a minimal upgrade in terms of content, minimal hardware changes, and maximum recycled components from the excess stock they had in previous productions, they are doing so to make profit and maintain profit.

How much profit though you might ask ? Answer : As much as their loyal client bank will give them !!

Of what concern is processing power to customers that will buy a product that is 90% as similar to the one they bought the year before and the year before ? what are they doing differently on their instruments to merit greater precessing power ? nothing at all.