[EzGraphs]

What you do with your twenties really isn't the significant insight of the article. Though there is some merit in the conclusion:

The twenties are for launching, while the thirties are for building what you launched.

The main point is to recognize the state of your brain at a given age and its resulting effects:

The trick is simply to take advantage of each power in the season it is given

That is applicable regardless of chronological age.