Brian Barrett writes: “January 13 was a fairly eventful day, at least for prepandemic times. Cory Booker dropped out of the presidential race. LSU trounced Clemson in the college football national championship game. Attorney General William Barr asked Apple to unlock an iPhone. And Google pushed out a seemingly tiny tweak to how it displays search ads for desktop computers. The result was a general smoothing: Ads looked like not-ads. Not-ads looked like ads.“