Your Professional Decline Is Coming (Much) Sooner Than You Think. Here’s how to make the most of it.
I'd say it depends on what your career is, or your careers are.
Somewhat related, Erik Erikson's Life Stages.
All too gloomy in my view. The good life is not so elusive. Love thy neighbor, etc, and quit focusing on oneself. The Lord will not judge us on our earthly achievements. It's like the Eulogy vs. Resume thing when you die.