Only took them 18 years for a new version
The first version of HTTP (http 1.1) was standardized in 1997 and today is.. well nevermind
Ironically, those involved in setting this up were complaining that "the standard was being prepared on an unrealistically short schedule" causing some new tech to not be included, some missed opportunities, and in generally lots of complaints and grumbling from various parties.
To be fair, work on HTTP/2 started in 2012, so that's only 15 years after HTTP/1.1 was released.
I can't believe how, after so many years, and for something as important as HTTP, they still can't get it right.
Poul-Henning Kamp has written a nice article on the politics involved and why some stuff is as it is today -- http://queue.acm.org/detail.cfm?id=2716278