Comment by skywhopper

14.04 is too new. They probably started working on this long before 14.04 was finalized, and retooling would be expensive and slow them down. And even then, 14.04 is still rough around the edges--not all of the kinks have been discovered or fixed yet. 12.04 still has over three years of life left in it, which is much longer than the probable lifetime of GHE 2.0, and a future release of GHE can upgrade to 14.04 if and when that's necessary/beneficial.