A note from Ben Smith: If you're listening to Mixed Signals' coverage of the radical changes to the world of media, I think you'll really enjoy Semafor's newest show, Compound Interest from Semafor Business, that casts a light on how pressure from technology and from Wall Street is radically shifting virtually every business. On Compound Interest, our brilliant colleagues Liz Hoffman and Rohan Goswami are talking to people at the front lines of those changes — starting with Uber CEO Dara Khosrowshahi, who used to run a ride-hailing service and now says he's running a platform to be "the operating system for your daily life." You can listen to Compound Interest from Semafor Business wherever you get your podcasts, or watch it on YouTube.