You're assuming it will never have mod support and also assuming the average player even plays and cares for the currently available DayZ overhauls (guess what, even if a lot of people play mods like overwatch, they are still the minority, meaning the average player couldn't care less) and once again, you're wrong, modders do have to worry about breaking the game; one bad release could easily kill the mod. Hahaha you have no idea what you're talking about. Literally everything you just said is simply not true. The server is complicated, because it is the game. The server processes the game and therefore needs to know how the game works and no, we don't have access to the engine code so we cannot just rip the new AI system and throw it into the older Arma II engine (not like it would even be as easy as C&P anyway) without lots of reverse engineering. As I previously said, the average user doesn't even play the current mods, so no the game won't die in 6 months without mod support and also, again wrong, not changing engines doesn't mean you cannot improve models, textures or even modify the current engine to support newer technologies (provided Arma II is actually a bottleneck). As for the Arma III engine: http://dayzmod.com/forum/index.php?/topic/151842-standalone-voting-has-the-delay-effected/#entry1521277 I hate +1 systems; I want to neg all of you.