The hobby is sports. I'm relatively gifted as a "hybrid" athlete, if I work hard at it I can get podium finishes at OCR / Hyrox type events. I'd still do it without that though, it produces an emotional state that, while not taking away the rational thought that there's ultimately not much purpose to anything that I do, makes me not really care about that at all. Makes things make sense even when they don't.
However, the fact that it (a) combines really poorly with a lack of sleep and (b) has an expiration date (athletic ability is of course age bound) do contribute to the sense of dread.
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
I think by and large it's a good thing, but in certain cases "nothing will happen" isn't the outcome I'm looking for ;).