Without doubt or qualification, the Sadies are one of this continent’s greatest extant rock ’n’ roll bands — just as they have been for the last quarter-century. Versatile and imaginative, they skip from astral psychedelia to shuffling bucolics and leap from puckish pop to righteous garage-rock without losing momentum or mastery. Their albums deliver masterclasses on pointed songwriting, lockstep harmonies, and a devil-may-care attitude to expectations and past successes.