I'm still hoping some researcher will publish a dataset of 'median lived density', rather than a simple density average. That is to say, a weighted density calculation. In other words, if 100 people live in one building in a vast desert the size of Texas, their 'lived/experienced density' or 'weighted density' is far greater than if 100 people live spread out in an area the size of a few football fields. Then we could have a more sophisticated discussion around density, as this issue aaaalways pops up when doing comparisons at the national level. (at the city level it's not as big of a problem, although even there some weird zoning differences can sometimes throw figures off.)