I think the best part of this article is the discussion of the ability to learn new abstractions. When I decide I want to file a patent, I go and learn about the patent system. Same with the Unix command line, the bus system in a foreign country, or how to go to a gym for free when traveling (most will let 'prospective members' workout once free).

My sister on the other hand probably hasn't learned a new abstraction since down-dog in yoga, and struggles with the fact that if she doesn't file a tax return, she faces huge fines. I still love her to death, and will endlessly redesign my website until it is intuitive for her.