I'm not considering such concerns at all; my comment holds even considering perfect orbits followed by frictionless point objects of zero mass. You can of cours

I'm not considering such concerns at all; my comment holds even considering perfect orbits followed by frictionless point objects of zero mass. You can of course pack into the height-dimension trivially when using circular orbits; the issue then is how many orbits you can pack into an orbital plane. I contend it scales with radius, not radius squared.