Twenty years ago this month, after rising to indie celebrity with a pair of well-received albums in quick succession, the Decemberists released The Tain, an EP comprising one nearly 19-minute song split into five movements. “The Tain” leaned hard into the literary folk-rock band’s prog-rock tendencies, foregrounding the hard-hitting electric guitars that only rarely popped up on their normal albums. I found it absolutely delightful at the time, and I’m happy to report that it still holds up.