Why would it end? That'd be like saying that NFL power rankings never end. Well indeed, the games keep played. Or more applicably, it would be like suggesting college football polls or future odds never end. People are interested.
But really, I'm not looking for a way to say "my league is better than yours". I'm just interested in getting a better measure of where I'm at.
But more general, it's something for us owners mired in IV (and III) to talk about. Since there's 64 IV leagues, 16 III leagues, and only 5 leagues above that level, there's bound to be a lot more teams spending time, often a long time, in these lower levels. I can definitely speak for that. So, it gives us something to talk about and feel like we've got a future, perhaps. I'd think you'd understand :-D