>The majority of folks are consumers and unable and/or unwilling to handle the complexity of self-hosting

The majority of folks just want to text and call on their phones. They are unwilling to handle the complexity of having an entire computer in their pocket. -- 2006

>There are no incentives for the major vendors to implement protocols that will threaten their massive advertising revenues.

Right. And Yahoo didnt want to be a search engine. They wanted to be the home page of the internet.