fretbuzzard
Gretschie
The irony being that some of the most innovative guitar building of the past 50 years has been incorporated into classical guitars. There is something wonderful about hearing Tarrega played on an instrument with carbon fiber reinforced lattice bracing or a sandwich top. Features that, if Martin were to fully embrace them, would make a sizable portion of forum guitarists blanch.Yet rock n roll celebrates itself as rebellious. 50s & 60s rockers rejected stale post-WW2 orthodoxy in a lot of ways, but left us with a legacy of a limited number of ways to express yourself in choice of a guitar. Nobody views the other instruments you cite as appealing to cutting edge, heterodox musicians. Their appeal is that they are conservative. (In fact it'd be rebellious if somebody revived the symphony as means to explore new boundaries in popular music. Imagine if Lady GaGa announced that from now on, she'd only record and perform with the New York Philharmonic Orchestra.)