I do wonder if the people who come out with the line "Life begins in your 40s/50s" are just trying to compensate for the fact that they're aging. Can they truthfully say they're happier now than in their 20s?
I turned 43 yesterday and I can hand on heart say I'm happier than in my 20s!!
I'm very fucking grateful to be aging having watched my brother die at the tender age of 28.
The way I see it is that I traveled the world alone in my 20s, having amazing adventures.
My 30s were for marriage, mortgage and babies, a different kind of adventure.
I hit 40 and was once again excited to be able to start doing all the things that excited me in my 20s and now I have more money to do them. My kids are 11 and 8 now, so more independent.
Of course, not everyone is in the position to pick up all the things they did in their 20s, nor may they want to.
But I'm infinitely happier in my 40s. I'm more confident, I don't give a shit what people think of me, I get to say no to stuff I don't want to do and can do the things I do want to do.
My zest for life has returned after the weight of responsibility and life admin I felt in my 30s with little kids.
I definitely wouldn't say life begins at 40 or 50 because it's trite, but it doesn't mean you should stop dreaming and accept what your life is at that point.