You just read my mind. Although I play ArmA too, I didn't touched too much life servers, because of the very nice optimization the game has. Talking about the rest you said, this is exactly for what I was searching almost since I had a computer and knew this was possible. An open world game that simulates life the best it can, mixing elements from different games. For being a footballer the mechanics of FIFA, military will have ArmA, cops will have LSPDFR mechanics... but everything in one. That will sadly be like 900 TB huge and very demanding in terms of PC, but who knows how everything ends. I saw the other day the game Flashing Lights and some people call it the new "LSPDFR", but I don't think so. It is still very new and needs lots of work to achieve the level of actual LSPDFR. I recommend you to take a look at it, just to have it in your "Let's see where this goes" list