WoW has been successful because it was not that sort of game.
I can understand the desire from some people to replicate the "best times" of wow by trying to replicate the atmosphere, even if they are going about it completely the wrong way.
But this is just something entirely different.
If you want some ultra hardcore game with a tiny playerbase, then I am sure there are those out there for you.
You vastly overestimate the popularity that sort of game would have, otherwise there would be one out there already with millions of subscribers.