Ya know... I dont understand the "30s is the new 20s" bit....
From about 21 until about 28, I smoked more weed, slept with more women, partied harder and generally had more fun than any other point in my life. At 29 I got married and started procreating. From there, I've sold all my fun vehicles (motorcycle, ATV, turbocharged import, boat, etc etc), I only smoke once in a blue moon, live a pretty regimented "normal" life, work more than I play and sleep with one woman which most often than not is actually defined as sleeping instead of fucking.
Whoever made up this little line doesn't know what the fuck they're talking about. Sure, I love my life and what I have achieved, but I had a fucking blast in my 20s.