> Probably because it requires sockets to be kept open. HTTP2 requires kept-open sockets, not server push. HTTP1.1 already supports keep-alive sockets btw, and

> Probably because it requires sockets to be kept open. HTTP2 requires kept-open sockets, not server push. HTTP1.1 already supports keep-alive sockets btw, and CDNs have survived that DDoS attack :)