I recall a university in canada had professors w=usi g their textbooks they authored but each edition was exxactly the same but they would change the quiz/assignment or exam questions so you had to buy it

on top of that we had to purchase a weird accessory to answer questions electronically instead of raising hands and he was a beneficiary of the company that built it

its so corrupt these textbooks were very expensive but we use like 1% of it

then bunch of students started photocopying and selling it at 95% discount and they got arrested with full on SWAT gear

it made me question the whole higher education thing i certainly do not encourage it anymore especially with LLMs now

Unless you plan on engineering, law, medicine, actuary i just dont see the point