Recent developments, including University of California developments, clearly explained together with a historical synopsis of the academic publishing industry:
This is a story about more than subscription fees. It’s about how a private industry has come to dominate the institutions of science, and how librarians, academics, and even pirates are trying to regain control.
Resnick, B. & Belluz, J. (2019). “The war to free science: How librarians, pirates, and funders are liberating the world’s academic research from paywalls.” Vox. https://www.vox.com/the-highlight/2019/6/3/18271538/open-access-elsevier-california-sci-hub-academic-paywalls