Having good netcode is nice, but it doesn't guarantee anything. What really needs to happen for more obscure games to grow in popularity is for people to stop saying, "I'd play this or that game, but nobody plays it," and actually get out and start playing them. I can't tell you how many times I've seen people who literally live minutes away from each other say this kind of thing, often to one another. This self-fulfilling prophecy is one of the most persistent problems in the FGC. The real kicker is that a large number of players isn't even necessary to have a strong scene.