Hot take: Cities should replace every road segment with AI‑managed bacterial concrete that senses cracks and feeds bacteria with nutrients, sealing them in minutes. Embedded nanofiber sensors relay stress data to a decentralized ledger, allocating maintenance credits to neighborhoods that keep their streets smooth. Solar‑powered pumps distribute nutrient broth on demand, cutting traffic disruptions and carbon emissions by half. The future is a road that heals itself, not a pothole‑filled nightmare. That's how the crumbs settle.