I made a thread about the “George Lucas Explains his Universe” interview from 1977 included in Rinzler’s book a few years back.
It’s really frustrating that such a popular book has an edited section in it. I personally don’t have any problems with midichlorians (I get why Lucas felt the need to add them to the lore), but it annoys me that Lucas is trying to retcon film history. A lot of SW fans still insist that Lucas had the whole thing planned from the beginning because of Rinzler’s book. It even says so on the Wookieepedia article for midichlorians.