Ok, so maybe it's 80k hours across a 45 year career, then. What difference does that make? 80k is still a reasonable approximation for the total time one has av

Ok, so maybe it's 80k hours across a 45 year career, then. What difference does that make? 80k is still a reasonable approximation for the total time one has available for one's career. Of course people's individual circumstances will vary, but that's not the point.