I actually spoke with a developer at E3, and this topic came up. My personal view is that no one really uses system link, when they can just jump on live at any time, and have the same features as system link. Sure its fun to have friends over every so often and setup a big house game, but thats a rare event. More likely to just jump on live and play with these people. But, what he did say, is that they take the time out to add in system link, the reason being, they don't want any bad reviews about their game based that its lacking system link. He agreed that it seemed to be a waste of time to code it in there, but the benefits of having a good review of the game is what mattered. This was an ubisoft developer, and I can't remember if it was Americas Army, or Ghost Recon 3 we were speaking about.