Comment It doesn't strike me as a big deal... (Score 1) 136
According to Android Developers Dashboards more than 92% of the present activated devices run some version of android past 4.0.3 (ICS), with the grand majority being Jelly Bean and Kit Kat devices. Thus if you develop for ICS or Jelly Bean you'll target most of the devices accessible by the Play Store.
I think what tends to be the greatest hurdles in compatibility right now are devices with either low ram, or low internal memory (since Kit Kat in several devices does not allow apps to get "moved to sd card" without rooting, effectively hampering stuff like HQ games and the likes...