On a September Thursday in western New York, the Buffalo Bills inaugurated a $2.1 billion stadium not merely with a ribbon-cutting but with a performance that felt like a statement of intent. Josh Allen, a quarterback who has quietly assembled one of the more remarkable early careers in the sport's history, threw three touchdown passes and ran for two more, guiding Buffalo to a 41-31 victory over the Detroit Lions. The evening belonged equally to the man and the monument — a venue engineered to turn one of America's harshest climates into a competitive advantage, as if the city itself had fina