Nietzsche is a very interesting example since there is a very obvious shift in his philosophy from The Birth of Tragedy to, say, The Gay Science. I understand the argument that the style of writing noticeably changes, and I'd be okay attributing that to "automated writing," but a lot of the shift in Nietzsche's work feels like a pretty drastic shift in ideology. I'm not convinced that shift entirely, or even largely, comes from the shift in medium.