Forgive my ignorance: what do student do with all these books? I did my U/G & Masters in Physics in Exeter UK. We used only 1 actual textbook (University Physics by Young and Freedman, about 45USD new). I bought 1 more by choice (Mathematical Methods in the Physical Sciences by Mary Boas) because I needed some help there and the lecturer was weak. But all the actual information I needed was covered in lectures, tutorials etc. Assignments were class specific and produced by lecturers. How does the US system actually use all these books?
I did my Master’s degree in France and I’ve never has a single textbook to buy. All of our courses were made by the professors. They obviously didn’t rewrite them every year because… why? It worked fine.
We had suggestions of text books if we wanted to go further, but they were all available for free at the university library