Hmm I was thinking about the last reply and had a few thoughts in general. I think once the tarmac space restrictions are in, restrictions on the number of bases won't be necessary or wanted. This is also true for the aircraft number limits at hubs. If restrictions remain in place, one couldn't hope to create an AWS version of Southwest, for example, which is an interesting strategy to try. That is, an airline based at a smaller airport (Dallas Love), with hubs or focus cities in big cities like Phoenix, Vegas, Denver, Chicago, etc... Southwest is actually bigger than Dallas in these and other cities. Basically, they have several hubs/focus cities, which are designed not to be as massive as a normal airline like Delta or United.