Very sound set of principles to follow. Having written software for more than 20 Years, I can't stress the importance for developers to become domain experts in atleast some "real world" fields like Mathematics, Physics, Electronics, Finances , Legal, Accessibility, UX Design, Biotech etc.. instead of just sticking to a pure software tech stack which ends up making them people who are just calling functions from ready made 3rd party libraries and drawing fancy rectangles on screens. Most Generative A.I. tools will soon make such jobs redundant.