Google was all about efficiency. In the early days, as with JSONP, the point was to eval the stuff. In some ways, it was a step back. Had we pushed for more E4X

Google was all about efficiency. In the early days, as with JSONP, the point was to eval the stuff. In some ways, it was a step back. Had we pushed for more E4X implementations we might have sent HTML over the wire instead, and would have avoided JS-based template languages, the overhead of converting JSON to at least one representation of HTML, etc.