I'm indifferent to whether it's 50 years or 70 years, for two reasons.
I just finished a book last month that was about literary social life in France in the 19th century. They had salons where people would go, and artists and politicians would mix. In that book there were lists of the artists and the writers who showed up there, and three-quarters of them were names we don't know.
In terms of copyright term protection, I think very few works manage to be relevant 50 years—or even less so—70 years after the death of the author. I don't know why we should be having so much difficulty over an issue that is important for only a minority of authors. That is one reason.
Second, if we are worried about the copyright term, then I think perhaps we should worry about that because of the fact that copyright covers computer programs. Do you realize that because of their nature, there is never a public domain for copyright programs, given the life of copyright programs? This is an industry that's getting absolutely no public domain.
Lastly, I would say it is possible to have a commercial life beyond term, and I think this is right. As to whether that term is 50 or 70 years, as I said, I'm indifferent. I would never walk outside or march for that one way or another, but 70 years is the term that we have for our major G7 partners; therefore, being a member of the G7 comes with a price, and the extra 20 years is a minority issue.