Back in the day, bike thieves could snip through cheap cable locks, but they were stymied by the more expensive U-locks. Not anymore. An ex-thief explains how one power tool has made it way easier to take off with your fixie. Also, how AI chatbots are levelling the playing field when it comes to dealing with experts. And we talk to Peter Nowak, the journalist behind a new Substack focusing on monopolies and oligopolies.