Mark :wa: :nd: on Nostr: it depends on topography, building height, radio interference, etc. for many cities ...

it depends on topography, building height, radio interference, etc. for many cities one high up node can connect most of the city to most of the city.
The bigger issues is once you get into the hundreds of nodes territory the network stops functioning. There was an update last year that was supposed to help a lot that was tested by defcon in Las Vegas. I believe london’s mesh is so big that they switched to short fast as the main channel.