Well argued. Once I was very into this and took pride in being able to read through Planck, Einstein and derive wave mechanics from first principles. At 50, whe

Well argued. Once I was very into this and took pride in being able to read through Planck, Einstein and derive wave mechanics from first principles. At 50, when it comes to modern theoretical physics I do feel like a 5th grader again. I am still interested. While in other subject areas I remain at multiple PhD level we can't stay match-fit at every intellectual game forever. So I don't see this as necessarily being written for 5th graders, though I am grateful for good science writing to keep up interest for people like myself who are super interested but need the 5th grader down-talking to stand in for pages of equations that are now well beyond me to follow.