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Re:Http2 explained by detaro on Thursday February 12, 2015 @10:46PM (#9042772)
They only try to cram functionality from lower levels into higher ones because establishing new lower ones is nearly impossible. SCTP (or variants of it) would implement a lot that is now build on higher levels, but there is a reason it's only used in private networks.
Re:Http2 explained by Chlorus on Thursday February 12, 2015 @11:42PM (#9042898)
No kidding, take a look at the presentation[0] for multipath TCP - and that was a relatively 'simple' transport layer modification. Look at slide #30 for a glimpse into the madness caused by crappy middleboxes.

[0]http://multipath-tcp.org/data/MultipathTCP-netsys.pdf

Re:Http2 explained by xorcist on Friday February 13, 2015 @05:13AM (#9043665)
The alternative is to layer something over HTTP. That's may be even worse. There are no simple ways to upgrade global infrastructure.