Support WBUR1966 Vs. 1971: When 'Rock 'n' Roll' Became 'Rock,' And What We LostMichaelangelo MatosSeptember 22, 2016 ShareThe Who in 1969, the year the group released the rock opera Tommy. Earlier in the 1960s, the band says it only cared about singles. By 1971, it was making albums that would help define the "heritage rock" industry. (Getty Images)