I think that’s where hyper-individualism leads us when people don’t want to share spaces but want their own little castle. But sharing spaces and parks would be vastly more cost and energy efficient (so I assume these countryside arcologies would also be very cheap way to live). Also you’d want an association that is geared to be more democratic than typical HOAs are (they are designed to improve and maintain property values for the whole project instead of living quality or utility). So even the individualism of suburbs are a kind of scam.