It's not the place of the old to judge the young.

Depends on the topic. I'd wager a 20 year old is wiser when it comes to the inclusion of homosexuality and transgender than a 70 year old still clinging to how things were in his time.

People used to make fun of 60 and 70 year olds complaining about the younger generation and "In my day, things were better..."

But now, it's the 30 year olds doing the complaining. I find that quite hilarious.