According to one study a force of up to three times body weight can be exerted on the human foot while running, and it can be much higher at times. Multiply that by each foot fall in a mile, and you have tons of weight absorbed through the joints and connective tissues. While some people are uniquely suited to do this high impact/high intensity jogging for decades of their adult life, many are not.
For those who want to extend their running life there is a solution; keep running and substitute one running day with one session of high intensity interval training (HIIT) for strength. One less day a week of pounding and you'll have stronger muscles protecting those joints. Add up all those days over the course of years of giving your joints a break. Your joints will thank you for it.