I am over 40. I've worked in games for almost 17 years. I've been with my wife for almost ten years and I have two kids. I spend 2 -3 hours a day after work and 8+ hours on each weekend day with them. I have no problems with eyesight, back or wrists. After my kids are asleep, I spend 2-3 hours working on my own stuff.
The studio I'm at is filled with people in their 40s. Keep in mind that it wasn't until the past 15-20 years that studios started ballooning in size, so its still a relatively young industry. True story, about a year or 2 ago, we had a concept artist who retired from here. First time I've ever personally heard of somebody…
I'm in my mid thirties and been working in the gaming industry for 10+ years now at three very different game dev studios and I've never noticed anyone who looks over the age of 40 :p I think it's partly down to 'big' gaming studios still being relatively young, I guess for anyone who has worked in the industry for 30+…