I've long advocated something generally like this, for patents and other IP as well. I would propose a longer initial term (~30-50 years) since the nature and

I've long advocated something generally like this, for patents and other IP as well. I would propose a longer initial term (~30-50 years) since the nature and value of IP has changed significantly since the 1700s. I would also put an upper limit on it, since the most valuable IP is now held by immortal corporations. The hard part for copyright is tracking what has been renewed and what has not, without some kind of registration system, which I don't think we want to add. Without this, it would make it very difficult to know if the work you intend to use/copy/distribute is protected or not.