I think there's a cultural aspect at play.
I come from a place where success is measured more by the amount of experiences you've lived and the fun you've had, then the money you've made or the social status you've achieved.
I like to use New Orleans motto as a way to describe it: Big Easy.
A good life is one that was easy going, lade back, where you've enjoyed the company of others, where you've explored the wonders of the world, and that's that.
It's the opposite mentality of: "What's my purpose?". You're not here to do anything, you're here to enjoy your stay. You're not here to make things, you're here to enjoy what's already there.
The irony is that adopting this mindset and living this way is actually surprisingly hard. Seems the body naturally leans towards anxiety, like we've maintained in our DNA fears from our evolution, constantly looking behind our shoulder, feeling the need to get on with it, be on top of things, etc.
Anyway, I am having the opposite reaction. I feel like getting closer to my 35, I feel like I've done everything. Accomplished all things that mattered, and like there's nothing more to do, now it's just routine and repetition. I've been there done that, seen everything, tried everything, so I don't get that excitement out of "undiscovered territories" anymore. And I'm working to adapt to this, be happy with the mondaine.