Yes I was going to mention just that. Having children will make your life purposeful probably forever? While your hobby has an expiration date and you'll still have many years left.

But now that I think about it, it's the same with children. When a 30 year old parent hits the 50 year old mark his children would likely be already left from home. So it's almost the same, still many years left.

PD: No notifications from HN is great. Nothing will happen if you forget to answer to an stranger on the internet. I'd have forgotten to check your response if I hadn't manually be looking for something in my own comments' history