A disappointing trend has become clear to Linux users in recent years. Whenever Canonical offers a new Ubuntu Long Term Support (LTS) release, it tends to be conservative in nature. (See our Ubuntu 14.04 review, which earned a “Missing the boat on big changes” headline.) Apparently no one wants to try to support a brand new, potentially buggy piece of code for half a decade.

http://arstechnica.com/information-technology/2016/05/ubuntu-16-04-proves-even-an-lts-release-can-live-at-linuxs-bleeding-edge/