The other week, I updated the operating system on my Mac laptop after putting the task off for many months. (One intractable flaw of technological devices: they never actually update overnight as promised.) The apps on my computer all upgraded to their latest versions, including Spotify. When I opened it back up, I found a new interface, one that began rolling out to users last year. At first glance, it didn’t look very different, though the usual three windows were more distinct from one another: a library column on the left, a central “home” window in the middle, and a view of whatever music I was currently playing on the right.