> But the fans? Why do nerds want everything spelled out for them? It boggles the mind.
Because it's enjoyable when done well. As a teenager I read LOTR, and noticed all the references to the larger mythos Tolkien had worked on - references to Fëanor, Elbereth, Valinor, and so on. Those were very intriguing, and the greatest joy I've ever had reading a book was when I finally read the Silmarillion and got to see what those things were all about. I concede that filling out the world can be done poorly (though I haven't read the Brian Herbert stuff and can't comment on whether he did a good job). But when done well, it is truly magical to have those elements in the background of the story take on a life and detail of their own.
Because it's enjoyable when done well. As a teenager I read LOTR, and noticed all the references to the larger mythos Tolkien had worked on - references to Fëanor, Elbereth, Valinor, and so on. Those were very intriguing, and the greatest joy I've ever had reading a book was when I finally read the Silmarillion and got to see what those things were all about. I concede that filling out the world can be done poorly (though I haven't read the Brian Herbert stuff and can't comment on whether he did a good job). But when done well, it is truly magical to have those elements in the background of the story take on a life and detail of their own.