SPDY "gracefully degrades" to HTTP, so there's not really a chicken and egg problem. If your web server makes it easy to enable SPDY, there's not a big reason n

SPDY "gracefully degrades" to HTTP, so there's not really a chicken and egg problem. If your web server makes it easy to enable SPDY, there's not a big reason not to (that I'm aware of). Technically SPDY is an application layer protocol, but you shouldn't need to change your existing HTTP application to enable it.