Jason Guriel writes: “Browsing couldn’t be done with the flick of a thumb. It plunged you into your entire body and set the body afoot, sometimes for hours, with no smartphone to check—and no easy way for others to check in. Browsing forced you to reckon with physical media, to wander among aisles and stacks that didn’t presume to know your preferences and weren’t so insidiously jostling for your attention. You could pause, eye a spine, and tip some strange compact sliver of the world toward you.”