To add even more, I'm going to throw out a hypothesis (and fair warning, this is all speculation on my part.) I think what others have said is correct, but I a

To add even more, I'm going to throw out a hypothesis (and fair warning, this is all speculation on my part.) I think what others have said is correct, but I also have to wonder how access to broadband and the internet affected the games. Back in the day, most RTS were single player games with a nice multiplayer addition. But you would have problems playing it without going to a friends house/LAN party. There, you were playing against friends and people you were effectively face to face with. It was competitive, but you were there for fun. Once the games became focused towards multiplayer, with a single player as the side, the games were mostly about competing against other people, people you didn't know, had very little social connection too, and it was all about how fast you could click. I think (at least for me, this was true) made the games much less fun. To have any chance of actually winning, you had to be very good. When you're playing people you don't really know, only to lose the game over and over again online, it doesn't quite become as much fun.