It is valuable copyrights that are responsible for terms being extended. Mickey Mouse and "Rhapsody in Blue." These works are too valuable for copyright owners to ignore. But the real harm to our society from copyright extensions is not that Mickey Mouse remains Disney's. Forget Mickey Mouse. Forget Robert Frost. Forget all the works from the 1920s and 1930s that have continuing commercial value. The real harm of term extension comes not from these famous works. The real harm is to the works that are not famous, not commercially exploited, and no longer available as a result.
Free Culture (2004)