‘Founder mode’ is the latest fault line in Silicon Valley

• Silicon Valley is split over the best way to run a company.
• An essay called “Founder Mode,” inspired by Airbnb’s Brian Chesky, says leaders need to be more hands-on.
• While many leaders agree, some think managers play a vital role within tech firms.

September has started with some navel-gazing in Silicon Valley as tech operators have been forced to confront an awkward question: are they running their companies the right way?