Thinking about the original post (and admitting that I have not read this entire thread), I realize that for me what's at stake with a particular edition (or game) is my stake in the hobby. The best way I can explain it is with examples. When I started gaming, I was in elementary school. I had plenty of free time and an increasing ability to understand these games. That lasted until late high school when I left it for other pursuits. Returning in college, I again had some free time and a good deal of intellectual energy to burn. When I again returned as a young professional, I had some time (although I was then married) and hence the brain power to spare. That was when I bought the most material too, as I had the most disposable income. Now, as a middle-aged professional with a family, I find that my time, effort and money just can't support such an intensive approach to gaming. I still like to get together with my long-time friends and enjoy a game every other week or so, but I just can't devote the large blocks of energy to it. It even extends to new games. I just can't get into them as I once did. So, I value the existing games that I do have and my mastery of them because I can still have fun with those older editions and games.
And this is where my stake is. I think what I see in my gaming firends is that is where their stake is, too. Some are stuck a couple of editions ago. Most all of us play for the past rather than really playing for the future. And, then one of my problems is that it all feels familiar--like I've done it before; because I probably have. What I'm really looking for is a new spin to an old record.
For me to bring a game to the table these days, it has to have 3 elements: a compelling story, cool rules, and miniatures/counters. I have a lot of material on my shelves that meets these criteria. Something new has to measure up or it just isn't worth me spending my precious resources on it.
I am not discounting that a certain edition or game has implications for narrative control and shaping the storytelling experience. It does. But, I think the reason people have something at stake in an edition (war) is more related to where thay have their stake in the game as a personal hobby. It is for me.