A highway is, after all, a place we don't really want to be. He makes some interesting observations. I think of PPR as a privately owned public place. My improvements are, in effect, my statement as to what the web should be. Although I admire many other places in the web, I've chosen not to mimic any in a literal way.
Diversity is good.
But diversity is also confusing. There is a lot of latitude in html to make different kinds of space. So I want to make it clear when you've entered or left this space. There are many doors leading both in and out. That's why it has identity.