Sure, that may be what AJAX and Web 2.0 are about. But isn't the point of a web site to provide some service? In the case of Lala, the service is to facilitate CD trading (or something along those lines). To best provide that service, do they really need Web 2.0 and AJAX? If they want to accomodate users of mobile devices (and wouldn't they? every visitor is a potential customer), then they should provide a working interface for those users.
On the other hand, if they think AJAX is the best way to provide their service, that's up to them... it's their web site. I think the author really means that they should be designing for a wider audience if they want to appease as many visitors as possible. Whether that demographic is important enough to bother with is another question.
On the other hand, if they think AJAX is the best way to provide their service, that's up to them... it's their web site. I think the author really means that they should be designing for a wider audience if they want to appease as many visitors as possible. Whether that demographic is important enough to bother with is another question.