Something I could not get to work is “recursive” scattering points on instanced objects. I assume this is a limitation, I think there’s something in the documentation about that.
Is there any hope to get that in the future? I’d love to have one node group to place houses on some landsape, than another one to place greebles (balconies, air conditioning boxes, antennas …) on the houses, while having it all be adjustable.