I am totally in line with Epervier and with my group we continue to use 4.09.
There are several reasons, but mainly we stick to 4.09 because, as a modder, I don't want to waste my time to adapt our mod configuration at each release from DT. Second point is that we flight only between 1936-1945 period on European theater only and some of following "official" version are not very interesting for us.
However, when necessary, we code what is useful for us.
Our 4.09 modded version is not at all frozen, include a lot of features (since at least 2 years) such as variable weather, improved G effects for pilots, AI visibility corrections caused by clouds-night-sun, AI's triggers, etc...
At this time, before end of next week, I will incorporate a new mod which allows AI taxiing before takeoff. I am not a video and fraps specialist, my development PC is limited in term of CPU and graphics, but 2 short videos to show what is possible to do with 4.09:
http://hist-simu.2jg51.org/Mods/AItaxi01.wmvhttp://hist-simu.2jg51.org/Mods/AItaxi02.wmvBecause we have made a common development with UP, two years ago, all mods are packed under SFS format.
Just to say that 4.09 is still alive