Have you seen how many new guitars and basses and drumkits hit the market every year, Donny..? Constant change and innovation isn't exclusively a keyboard thing. But what you DO see is, once one of these 'real instrument' players get them, they tend to hang on to them longer, at least once they find something they like.

And curiously, it seems the better the guitarist or bassist, the older their instrument is. Funny how that works out...

....'Nuff said?