Ask HN: [Over 30s] What makes you more effective than your early 20s self?

I make about 3x my post-graduate salary, and I sometimes ponder how I can be _that_ much more valuable. Current ideas:

- I now take more global responsibility for contributing to a business outcome, instead of “My part works”

- I obviously know more technical things, but crucially I rarely get stuck for hours on something “small” (like SSH keys) which was never taught at school.

- I know more about myself and arrange my day accordingly. Before I optimized for how I felt I “should” like to work.

- because I have proven myself, I get put on projects which are worth a lot more. even flawless execution of my first few work projects probably would not be worth my current salary.

What are yours? Why couldn’t any of the thousands of new grads each year do your current job?