37 here, gf, we don't believe in marriage, no kids, we don't plan to have one anytime soon, full time job. 6 hours of sleep is enough for me, so I have enough spare time to play. And no, I won't ever feel too old to play. I'm a free man and I always do what I please regardless of what people think of my way of life, which is basically work / gf / play / fitness / travel around the world, and I enjoy every little aspect of those. I feel sorry for people who feel too old to play and got bored like the guy in that article, they are not too old, they have simply lost the capability to enter that mental attitude called suspension of disbelief, which should be completely age independent. Those are people who fear they're going to lose grasp on reality and unconsciously refuse anything related to fiction, to persuade themselves they are mature. Thing is, you're mature when you are able to always separate reality from fiction and switch easily from one state to anoher, not when you refuse fiction to get in your real life.
Age in itself shouldn't prevent you from playing, ever.