I changed my vote of the initial poll to “nothing”. Here is why:
I realize that my Fairphone works OK (running FP OS 1.8) and all basic functions are available. As long as Firefox Mobile works (this is the app I use most, by far), I don’t see a problem with Android 4.2. So pursuing a goal, which is not reachable, rationally is not worth spending time and brain force into.
What I am concerned most about now:
How long will my battery do it’s job? This is the current limiting factor of my Fairphone because I want to keep the FP as long as possible so I can show it to my friends and tell FP’s initial story. It’s really not about the OS, if you think about Congo and China.