The mistake I see people make it _not_ ending their career out of narcissism, pride, ego, etc.

I am not a religious person but it is good to remember you will die. You should have some better stuff to put on your tombstone than your job title.

People aren't going to care who you were in 100 years and people aren't going to remember you in 1000 years. Your tombstone will crumble in the dirt.

Spend time with people you love, spend time with your family and friends. Find meaning without economic strings attached.

I highly recommend folks read Ecclesiastes, which opens with "Everything Is Meaningless". It's a philosophical book on what matters in life (and what doesn't).

  What do people gain from all their labors
    at which they toil under the sun?
  Generations come and generations go,
    but the earth remains forever.
  No one remembers the former generations,
    and even those yet to come
  will not be remembered
    by those who follow them.

Oh and by the way: you might die sooner than you think. It happens all the time. Are you spending time the way you want?