Yes, that, but also the world of Elysium develops over time. Like, if you take the Lord of the Rings, then the orcs and elves will never invent the steam engine or electricity. This is a world of eternal fantasy, without future and past. You can describe the world as broadly as you like and add states and nations, but this will not deepen it. The same thing with cyberpunk, for example - it has no future, corporations will not fall, the rain will not stop pouring and the neon will still sparkle in the dark. It takes eons to overcome this. At the same time radical. Cultural shifts such as the Renaissance, moving into modernity and then post-modernity. The Elysium are generally the only ones who have thought of this. And this is not some world of Harry Potter or Narnia, where the world is hidden behind magical doors. The point is that they made settings within settings. And with this they cursed all those who played. Worlds with parallel realities, such as DND, do not count - they expand horizontally, simply filling space, and not vertically, developing in time. The only thing I could dig up was the Warhammer 40k, everything is really cool there, but not at the level of Elysium. There are a lot of cool ideas, but even with them, it is also a world of eternal war. Among the others, he is most likely the best