As Manuel Neuer eyes a 40-year-old farewell with Bayern Munich, former legend Oliver Kahn warns: the physical toll of three tournaments at that age is immense. Drawing from his own near-40 career end, Kahn questions whether legacy still demands sacrifice. In this deep dive, I blend data-driven analysis with soulful reflection — asking not just what Neuer can do, but why he chooses to. This is football as both sport and existential choice.