Speed and performance "improvements" of the new protocol do not justify all the additional complexity that comes with it for almost everyone in the world. Of course everyone could use some improvements, but they are not the things large corporations benefit from, they are thing that concern people who do not have planet scale infrastructure at their hands. I would like to see changes for easier resilience or even for distributed client/p2p caching for example. Doesn't matter though, we already lost.
Most people don't pay any cost. They just add a few letters to their webserver config and everything gets faster. There's no further complexity required (other than TLS.)
I don't see how SPDY prevents someone coming up with p2p caching. Although a serious use case would be a good start.
My point was: it is not something that everyone needs and yet it is a standard, but something, that everyone could benefit from, is not even on the table.
