Just a short summary:
The latest vcs snapshot of AOKP's 4.2 doesn't compile anymore - AOKP doesn't bother fixing or updating it anymore because it's obsolete.
It should be possible to make 4.4 work on tegra2 devices like the streak 7. From what I heard from giveen the only problem is that the kernel does not compile with the newer gcc from the Android 4.4 SDK.
I have little experience with c and linux kernel development, but fixing a few errors between gcc versions - how hard can it be? I may actually look into this when I have a lot of free time. Because the Streak 7 is still here on my table not doing much right now.
Actually... I have googled and here is a quote: "galaxy tab 10.1 which is a tegra 2 device running AOSP Lollipop". I wonder: Can Android 5 work on it?
Kk and/or lollipop would be a hugeeee step up in the way the system would perform