I don't think anyone has exhausted the range of sound possible in a conventional rock band, but people do become slaves to their own easiest techniques.
“Among the weeds choking out growth and good government are the hundreds of boards, commissions, and advisory committees that have sprouted over the years. They devour time, money, and energy far beyond any real contribution they make.”
“For example, a breakthrough in better batteries could supplant hydrogen. Better solar cells could replace or win out in this race to the fuel of the future. Those, I see, as the three big competitors: hydrogen, solar cells and then better batteries.”