Just like I said: Not everybody can last for a year in-game, which kind of limits the impact the OP’s suggestion would create. It is to my thinking that only a minority of players can boast surviving for years, unless someone else can prove otherwise.
I’m not saying that it’s impossible to survive for years and have fun during that long period; on the contrary, I do acknowledge that it’s possible. But as of now it’s just that it’s kind of…“limited” and difficult to do. As it stands, the OP’s suggestion kicks in at around 30; 10 years after the initial spawn. Given how the game works now as well as its current content, it’s kind of difficult to think of ways to keep players busy for 10 years with just one character.
Bravo to the ones who’ve managed to keep having afters after years of in game time. I’d love to see what people who have survived for years have done to busy themselves though. I can imagine huge projects (like massive vehicles or town forts), exploring everything, and outright zombie genocide among other things.
Edit: I realize that I may have looked at the trees too much and not at the forest. The details I mentioned with regard to age can be adjusted to a point that it’s balanced in a way that the effects of age would kick in at a reasonable amount of time. Now that reasonable amount of time though, would be up for discussion.