By that I mean when you have to wait over 20 years to find out the conclusion of a story...isn't that a bit ridiculous. More so, you're kinda stuck in that one story. There's stories within the stories of course, and it covers multiple plots, but it's still sorta the same thing and spending so much time on one story seems a bit exhausting after a while.
I think the first truly long epic fantasy I read was the Wheel of Time. It was one of those books that takes you to some new and interesting places while somewhat treading familiar ground. But it was the first one I read where the world-building was much more detailed. Years later I would read Herbert's Dune, and that was awesome because it had characterization, world-building, a convincing a compelling mysticism, and an entrancing sense of philosophy. It's one of those stories- like The Matrix where the ideas carry you through the story as much or more than anything else.
I wanted to write just like these people, but looking ahead...do I really want to string readers out with a story that's over twenty years in revelation? Not really. It's not like the stories aren't good, but I'm beginning to wonder if shorter stories are more effective. They get their point across quickly and then you can move on to other interesting people and other interesting places involving completely separate events. You cover more ground. It's not done to show off the world, but to broaden the scope of it and the readers experience. Twenty years of Kaleesi this and Kaleesi that and I kind want to see her pulled apart for a change of pace. Westeros is a great creation, but spending so much time in it...you want to kinda escape it entirely. I want to go to Ashai. Beyond Ashai.
I think my fondest memory of short, entertaining stories is the Dragonlance series. Hit and miss for sure, but there were some great hits in there and the breadth of the world that is created from telling new stories rather then dwelling on the same one is preferable.
But that's my take. I love Ice and Fire, and I need to read the ending, but I don't want to pick up another story of that length again. And it hasn't ended yet. That means...god help me...it might end badly. As in Rotten Tomato's GRRMartin trolled us all badly. That's a 20+ year investment. I can see that lunatic stock's and market guy from FOX NEWS going crazy.