The B12 no longer has the luxury of focusing on regionality. And if the conference is large enough, the geography can be figured out. Because if you focus on geography by adding programs like Tulsa, Tulane, or SMU, when the top dogs inevitably leave and the only viable options are outside the footprint you are stuck with worthless brands inside the footprint. So go grab the programs with the most value now and don't get stuck with less valuable programs long term.