This thread discusses the Content article:
When Not to Use AJAX
I think it's rather more likely that browsers will have to adapt to AJAX by, for example, making an easy API for mutating the history list and setting the current bookmarkable location. Google Web Toolkit for example already has tricks to do this, but they shouldn't have to use tricks, it should be built in.
AJAX as a design concept just makes so much more sense than server-side pages. Push all the UI work to the client (which has untapped processing power waiting to be used), let your server handle only the initial page delivery and the data (the minimum set of information which absolutely requires the the server's special knowledge).
It's simply conceptually cleaner.
