I agree. Unless there is some driving need to change the kernel, I am not sure anyone has the free time for all the work required. Also there seems to be no interest from those using oe-alliance to upgrade either.
I gave up on the duckbox developers' build environment about a year ago and switched to using oe-alliance (Taapat and MastaGs' gits). But I still use the drivers from duckbox developers. There are advantages and disadvantages to both build environments and not being a developer, I have to heavily rely on work from others. A short time ago when I noticed the dropping of enigma2 from buildsystem-ddt, I started looking into using Audioniek's git, but have not had the time to do much. If Audioniek is dedicated to continuing, I would be happy to follow his git and contribute what I can. But I only have an alien2 (spark7162) to play with...
BTW -= I know MastaG has been testing with gcc 4.9.4, but I have not tried it yet.