This week, writer Rob Walker discusses Waymo, which had been considered the most trusted company in the autonomous-vehicle race until a misguided trip into a Lunar New Year celebration in San Francisco ended in flames (literally!). Next, remember Facebook in the run-up to the 2016 election? At that time, the company sponsored debates and aggressively courted political advertisers. But this year, the company is working just as hard to stay out of politics altogether.