Updating your misunderstanding fast enough to survive it.… The first sign was the traffic lights. Not broken. Not hacked. Just… adaptive. In 2026, Gunma’s smart corridor pilot system started changing signal timing every 30 seconds based on real-time sensor fusion — weather, pedestrian flow, delivery drones, even convenience store purchase spikes. Tatsuya, systems architect, watched the dashboard flicker. Yesterday’s optimization was already obsolete. He sighed. Reality had shortened its update cycle again. ⸻ Tatsuya remembered his university days, when professors said: “Concepts are tools for compressing reality.” Now he worked inside systems where reality updated faster than compression. His team called it: Operational Drift. The AI team called it something else: Concept Drift. In machine learning, when real-world data changes over time, models trained on old data lose accuracy unless continuously updated. ...