I think all those systems allow baking to HLOD - streamed PCG tiles are fast but I don’t know how they would bake to HLOD - it should be possible.
Yeah I was going to mention height fogs too, but I think the occlusion is where Nanite shines, it’s where you can overtake traditional rendering to get much more on screen - as long as your meshes have fine polygons to allow good cluster culling, that’s the important part.