I think considering how long XvT lived, and the fact that Star Wars has almost always had new media in one form or another keeping people interest in the universe, FotG could be distinct from TBP, WCS, and Diaspora in that regard. It was why I revived FotG in the first place, the XvT community was dying as the game got old. It wasn't until I was too far in to realize that the game's multiplayer engine itself wasn't up to what I had hoped it could do. But I'd love to do whatever I could to help make that change. No offense to any other projects but I really think FotG has the biggest change at bringing constant multiplayer interest to the platform, just because of the constant interest in the IP it is based on. Although that's also the most likely reason for it to get a C&D, so...we'll see what happens there.
And TBP and Diaspora are both very good games. If multiplayer had been better, I wouldn't be surprised if people would still be playing them both now. Yes, many games die, but I think that's more on the publishers than their community. If they stop releasing new content, or encouraging the community and interacting with it, it will often die, with exceptions for hugely popular and competitive games. But mods in this community can be added on to by anyone. Anyone can create their own content, including multiplayer missions, etc. Many games that have died have no such mechanism for involvement like that. The sandbox can often keep people coming back.
We could all be wrong though, in that people just don't want a multiplayer experience like we could ever offer. People seem to be getting used to just dropping into random battles at the click of a button. Or joining ongoing games that never really end. Lobbying up to start a game and sitting there waiting to start may be beyond people's threshold for the most part these days. But some aspects of that are still things that could be helped technologically.