Do aging rock stars playing their 20-year-old hits at high-priced arena shows represent a threat to continuing innovation in rock music? “Nostalgia is powerful, yes, but [Rod] Stewart, [Paul] McCartney and company are taking these millions of dollars out of fans’ pockets with mediocre new material… How do new, deserving artists get wide exposure when fans are buying one floor seat at the Rolling Stones versus tickets to Death Cab for Cutie, Modest Mouse, My Chemical Romance or the Shins?”