Since when did experience = aged out?

I recently stepped down as the Executive Director of the nonprofit organization I founded 10 years ago. I was super stoked to have managed to keep an entity that depends on donated funds, afloat and thriving for 10 years. I had checked off every job description possible-

Creative problem solver, Office Admin, Grant Writer, Accountant (don’t ever hire me for that), Janitor, Inspirational coach