Comment by OkayPhysicist

Copyright has nothing to do with innovation. That's patents (publish your tech secrets in exchange for exclusive use for a period of time). Copyright is about protecting creative works, which are, by their nature, much much easier to copy than to make. If I write a book, and bring it to book printer to print 10,000 copies, I think we can all agree we prefer the world where that printshop can't turn around and print as many copies as they want, selling them themselves, and never paying me a dime. So I need some legal concept that says my creative work is mine alone to copy, that I can sell exceptions to.

Comparatively, society loses out on a lot less with long copyright terms compared to long patent terms. Long patent terms stifle innovation, long copyright terms just mean I can't freely distribute my own copies of others' art.

IMO, the happy compromise would be a tapering of copyright over time. For the first, say, 2 decades, you have contemporary copyrights. You can choose who to license your rights to, including the production of derivative works and the like. For the next 2 decades after that, a price is codified such that you still are guaranteed a cut (variable on whether the work is a verbatim copy, an adaption, or something significantly different). For the next 2 decades after THAT, you get a smaller cut, and non-commercial use becomes a free-for-all. After 80 years, it's a free-for-all.