I'm possibly (probably?) the only person on here who has been on the R&D teams designing organs, pianos, synths and keyboards.
Going back 40 years, when products had a shelf life of around 2 years, there were multiple teams working on new products. One team were working on finalising the 1978 prototype, another working on the 1979 models and another working on the new digital technology for introduction in 1981. And by that time another team was working on the V2 version of that digital system for 1984. By 1984 they'd started on the next generation digital system and so on.
Without giving too much away, nothing's really changed, apart from a dramatic drop in the number of makers and economic conditions combining to make the shelf life times longer - maybe 3 years for keyboards these days. So they do have a 'road map' of what's ahead, and you can be sure that they already know what will be around in two to three years time. And they'll take note of how current models sell, of course, as well as listening to what end users have to say. And they'll weigh everything up before deciding specifications.
One of the first things I was told in R&D was "Although YOU may think something's important, or even vital, it doesn't mean that it's important enough to go in! Your voice, though important, is just one of many and you may well be in a small minority. YOU must think of what goes into a product as being of the maximum benefit to the maximum number of customers." I often think of that when I read 'wish lists' on all forums!
