You are on to something. The extensive copywrite terms have ensured that the work of everyone except the oligarch corporations vanishes into the ether since it cannot be reproduced for over a century if the author lives another 30 years.
There will be no one debating the great minds of the twentieth century because the corporations made it illegal for people to republish critical editions of any such works.
The greats were recirculated every twenty or thirty years for centuries.
The smaller authors will vanish into the nothing and Western Civilization's 20th century onward will vanish and be almost forgotten forever because of that mouse. There will be more ancient literature remembered than literature after the invention of the printing press because they made it illegal to share printed materials for nigh on two centuries if an author was young when they wrote it. There will be more ancient scrolls preserved for the future than books of 20th century philosophy and science because the latter is a crime.
Only the oligarchs who pirated the books will have a cultural memory. They have cursed our era to oblivion when it comes to intellectual property because they can generate billions now for the mouse's henchmen.