“Aperture” is his longest, strangest, most exhilarating single since “Sign of the Times.” Photo: Harry Styles/YouTube Most of the heavy hitters in the club of artists with over 100 million Spotify followers — names like Taylor Swift, Bad Bunny, Ed Sheeran, Drake, and the Weeknd — seem allergic to the concept of substantial time off. Their albums tend to roll out every year or two, punctuated by long stretches of live gigs and other exploits beyond music. The underlying notion that you can