“Deerhunter aren't looking back anymore. The Atlanta band's biggest breakthrough to date, 2010's Halcyon Digest, became an outsider rock album worthy of obsession in part by hearkening back to a time when such things were more commonplace. Their 2013 follow-up showed how obsession can turn into, well, Monomania, subverting the band's own success with a set of songs that were at once messier (the sl”