There are longtime Tegan And Sara fans who jumped off the bandwagon when the duo released 2013's Heartthrob, their last album. I see these people online; they're out there. For all I know, they're a vast chunk of the duo's old fanbase. For these fans, Tegan And Sara abandoned their confessional-punk roots for shallow, generic pop music, losing an essential part of themselves in a sad quest for mass acceptance. I don't understand these people. Heartthrob is, to my ears, a vast leap beyond anything the duo had done before. Their old records had grace and power and melodic sophistication. They had songs. But the way the band showcased those songs was through a deeply safe take on rock music -- vaguely glossy, vaguely organic, vaguely everything. Heartthrob took all that vagueness and made it sharp and hard. Tegan And Sara figured out that glimmering '80s roller-disco synths showed those songs in their best possible light, and they made everything click.