Okay, so here is where we're at. The Cold War Campaign is getting more and more time consuming to move forward, as the races have grown and the turns take longer to process. While still not as large as the Phoenix Campaign was, it has gotten to the point where I have to force myself to sit down and work through each turn. I could continue, if I wanted, but I feel like I'm at the point of diminishing returns.
As Gyrfalcon noted, the Alliance is now the dominant power in known space. Even if all of the other powers in known space joined together against them it's not clear they could defeat them, as the Alliance also has the highest technology, and the other powers would have to attack independently, without being able to coordinate, for the most part. The Mintek, the primary aggressor race in the campaign at this point, was not shown in the recent comparison post, but if they had been it would be clear they are outmatched. Their income is approximately equal to that of the CSR, which means it is half that of the Alliance, and their fleet is at a similar disadvantage. Worse, they have no friends, and if/when they launched their final assault on the Alliance, they would rapidly find themselves under attack from at least the CSR, if not the Colonial Union as well.
All of this means that I am considering calling a halt to the Campaign at this point. The Campaign is over three years old at this point, and that's longer than I thought I would be running it. I'll let you all know what I decide shortly.