Just to correct a few details that don’t contradict your main point:

Now its the lifetime of the original author + 80 years after IIRC

Life of author + 70 years.

Copyright has stalled so severely that the latest works to come into public domain are from the 19th century.

Things from 1927 entered the public domain in 2023: https://americanwritersmuseum.org/new-works-to-enter-the-public-domain-in-2023/.