@Cymru
I have always been pushing myself to lean new hard things, I have been interested in physics my whole life, and did an undergraduate degree about 50 years ago. Have tried to keep up.
So now I am working on understanding this new, and pretty wild thing called The Wolfram Physics Project.....
Have not yet decided if it is worth anything, or not.
But it's new and it's hard, and I like that.
The Wolfram Physics Project
https://writings.stephenwolfram.com/2021/04/the-wolfram-physics-project-a-one-year-update/