Early in the pandemic, Sidewalk Labs — an offshoot of Google — announced it was shutting down a big project in Toronto called Quayside. It was meant to be a testing ground for smart-city concepts, a hyperconnected neighborhood from the ground up, with things like an underground network of package-delivery robots. But even before the pandemic, it ran into the same problems that have dogged smart-city projects around the world. Marketplace’s Meghan McCarty Carino speaks with Shannon Mattern, who focuses on this topic in her new book, “A City Is Not a Computer: Other Urban Intelligences.” Mattern said optimizing cities for connectivity often means giving up privacy.