True. However, those cities should be inactive cities that have been migrated to the edge on their way to eventual dissolution.there will always be a bunch of cities in the outermost rings who will always have zero neighbors in two directions.
I think I found a corner on W: Prue709. I am more than 80 rings away from that city, and I am on the frontier of active cities.
I'm 75+ rings from the center of W.