Well I know majority of the members here are over 30, but im 22, have been building kits since i was 6 years old. My father wasnt a big builder, but he did build when he was a kid, and he did build when i was 2 or 3....then id try riding the model and it ended up smashing.. he was cool with it.. hehe.
anyways, i will be building the rest of my life, or as far as the hobby is alive, i wouldnt worry about the slack, everyone here has 50 years+ left in them... i wouldnt worry about it. lol