Sure, Roblox does too, to some extent. Nanite allows all of this to be taken to the extreme, allowing you to do things that are practically impossible with other engines, including Godot. I think the next gen of games, that use Nanite, are going to stand out in a ridiculous way, which is often appealing for AA/AAA studios.
Who cares? Storage is cheap and is getting cheaper. Huge games are inevitable. (unless we come up with some sort of an AI that generates all the objects and textures close enough to the real ones)
Real time GI makes such a radical difference in a way games look.