For an HTTP company they sure do hate hypertext. Their entire write-up is just a blank white page unless one successfully executes the javascript from 5 separate domains.
But to be fair, we're not a company, but a working group. And we don't hate hypertext, we just haven't gotten around to implementing server-side rendering, which would be a nice thing to do.
What on that page of just text and images made you feel an entire application was appropriate instead of just a hypertext document? I hope this application-centric approach isn't also being applied to the HTTP extension. Hypertext documents should at least get an equal share of the consideration for an HTTP protocol.
I get that for commerce HTTP is just a transport to deliver the javascript/json/etc application. That's the way things are. But HTTP in general has to handle more use cases than just commerce.
I worry that adding this dynamic checking of state to HTTP itself will make websites that adopt it inaccessible and unusable for almost every browser that currently exists. Only new software will be able to use them. It's a substantial break. Maybe don't call it HTTP.