Call me a spoilsport, but in a way, I'm glad that CFS4 hasn't happened. I spent lots of time tweaking CFS. It was far better than the stock game - I had all the mods, all the stuff. Then a friend gave me CFS2. And it started again. Multiple installs, mods, add-ons, new skins, and so on. Then I got CFS3. The first one where I actively paid back some of the debt. My own skins, Battle of France, Med Air War, ETO, West '40, all the other odds and ends I've uploaded here and at Reg's... One hell of a lot of work, and compared to some, I don't do that much. But one hell of a lot of my time, and the time of other modders with whom we've worked, and still work.
And the day CFS4 comes out, it all goes straight down the drain, and we start again.
I've done that too often to want to, but know that even if I hold out for one year or two years, you've got the bug or you haven't got the bug. So I'd end up buying it, and just the way we all do, I'd wonder, "Why isn't there a...?" and start thinking about how to get one. The thin end of the wedge.
No, I want to play with CFS3 a bit. I've had it for five years, and never really played with it at all. After all that work, it might be nice to try, before someone puts me on the treadmill again.