whether you (generic context) agree with them or disagree with them, Yamaha sell lots of units of their PSR line, why change a marketing model that is so remarkably successful. (you only need to see the posts, text and musical, that appear at places like PSR world and others to make that judgement). personally i would never use a PSR anything (i did try the 3000 for about 2 days!!), but as i have said before you cannot knock anything that is that successful. Yamaha are not the "musicians benovolent fund" and therefore have no responsibility to anyone other than their shareholders who will soon let them know if something isn't working..Roland, Korg, Ketron et al, have their marketing concepts and plans, and those plans and concepts are probably out of favour with yamaha users, but again, it obviously works for them, so why would they bother to radically alter them as they are obviously working for THEM...
just my 2 cents fellas!
cheers
dennis