SPDY (and thus HTTP2) is implemented and shipping in Chrome, Firefox, Internet Explorer 11 (except win7) and Opera. It's all ready and mod_spdy and the nginx spdy module are solid and available.
Wow, okay. I knew some of the bigger sites supported SPDY, but I didn't realize that the browsers outside of Chrome were already supporting SPDY (and HTTP2) as well.
So (pardon my ignorance, I googled a bit but didn't find very conclusive results), why isn't everyone using HTTP2/SPDY now? Because of IE < 11 and Safari?
Edit: Or maybe because of the SSL requirement?
Edited again: For clarity.
