Its pretty obvious isnt it?
While there is still passion and desire for the drum, bass, & 1or2 geetar band format, things will stay the same......
There was a bit of a design flourish in the 80s, but Britpob bought the format back into vogue in the 90s.....
Whilst Geetarists (bless 'em) still want to play Strats and Les Pauls we'll be twanging Fender clones of one sort or another....
These are generalisations I know, but just check out popular geetar sales, and you'll see what I mean...