I don't see much hope for the end of perpetual "temporary" copyright extension (in the US), just due to the realities of the legislative process. I also wonder

I don't see much hope for the end of perpetual "temporary" copyright extension (in the US), just due to the realities of the legislative process. I also wonder if the fair use exemptions have the unintended side effect of making it seem like we don't need a public domain.