The LTS life cycle differ between Ubuntu Desktop and other Ubuntu flavours. Ubuntu Studio are using the LTS length of 3 years, just as other flavours do.
https://ubuntustudio.org/2015/05/precise-and-linux-lowlatency-3-2-eol/#comment-157
I think you are very mistaken about the Ubuntu LTS support life, it used to be for 3 years on desktop versions, and for five years with server versions, however this policy has now changed, abd b...
https://ubuntustudio.org/2015/05/precise-and-linux-lowlatency-3-2-eol/#comment-156
12.04 kernel seems to be better lowlatency than the new one. Any advice for improving the latency performance? It's still workable, but makes me nervous...
https://ubuntustudio.org/2015/05/precise-and-linux-lowlatency-3-2-eol/#comment-155