The idea of subsidizing W.F.N.H. efforts is not novel. Last fall, a startup in the U.K. called Flown began developing what it describes as an Airbnb for undistracted knowledge work. The company’s home page features enviable locations, such as a room in the Cotswolds with a desk facing a floor-to-ceiling picture window overlooking a meadow, available for short-term rent. As the founder of Flown, Alicia Navarro, explained to me, when we talked on the phone, the target for these rentals is not individuals but large organizations that can buy time in bulk to support their employees.