There are currently big problems with creating dense forests using nanite trees. Because the vegetation has a masked material, the nanite vis buffer takes a lot of time.
A solution to this would be to be able to replace the high-poly nanite mesh with a simplified copy (billboard) at a distance.
It would be very nice to be able to automatically swap the mesh on the right with the mesh on the left at a certain distance. But at the moment the only way to do this is to make 2 different meshes, manipulating MaxDrawDistance and MinDrawDistance.