I have an uncle who used to play varsity football (or rugby, if you are European, I think) in High School, played it in college on a scholarship, and never missed a game when he moved out, getting all he could on paper view. He had boat loads of paraphernalia and trinkets relating to his football days. When he eventually passed the bar exam and became a lawyer, got married, went on to work for some big company and grew up he stopped having as much time to watch football. As he aged, he stopped being as fast or as limber as he used to be and lost the edge that made him a great football player. He became an ordinary guy, about as good as at throwing a ball as any other schmuck and his neat football stuff went into storage.
That said, he still records it to watch when he can, listens to it on the radio, I imagine, and plays it a bit with the family when he gets time off. He plays less but still plays. I imagine vidja games and D&D aren't so different.