That would have been plenty, but Paul continued to muck around, building new equipment, new effects and experimenting with the noises he could generate with his guitar, directly leading the music world into the rock era. Oh yeah--overdubs--he invented those, too.
I don't mean to suggest that if it weren't for Paul, we'd all be sitting around listening to the hammered dulcimer--someone would have done the things Paul did. It's just hard to imagine that someone could have nurtured their development as well as Les Paul did.
Fare thee well, Les