I must admit that is the reason I wouldn't go now. It is great to go to a festival and camp somewhere when you are a teenager and live at home, it just sucks when you have to worry about whether your back is going to hurt the next day!
Sounds a bit like reverse elitism though. I went 3 years and didn't care in the slightest who was playing. Why should it be different now. Ok, it was a lot cheaper then.
So you saw the transition of being a kid running round being excited to be at a festival without your parents to someone older who could look down on them?
I can't complain about that. I went to reading at 18, it was great, I was excited to be at a festival without my parents getting off with some girl. If that is what they are doing now, it seems like a good use of their time.