> Do you count down the years until you can no longer make the 30 under 30 list?

Hitting 30 seems to be the benchmark point. The "What have you done with your life so far, its all down hill from here" moment.

Its not just the regular folk, we get essays from far more accomplished folk like sama as well. [1]

[1] http://blog.samaltman.com/the-days-are-long-but-the-decades-...