Not everyone was pleased. Once, at a red light, a woman in a black SUV tapped her window and scowled. She accused Mara of snooping. “You people and your gadgets,” she said, as if the car were an intrusion instead of a witness. Mara felt the old, prickly defensiveness, but the hatchback responded quietly, projecting the woman’s own memory of a childhood road trip where she’d fallen asleep and awakened to the smell of pancakes. The scowl softened, replaced by something like nostalgia. The woman waved a small, embarrassed apology and drove off. The car saved the sound: “Regret — 18:02.”