Alt networks as I say will be in my opinion for specialised purposes. Like governments wanting their data ONLY on their machines. Maybe there will be a special archive system that wants to be separate for some reason.
But like the WWW Internet the first one adopted will be the one used because using multiple clients to connect to multiple networks just to browse from shopping site 1 to shopping site 2 to searching network 1 to searching network 2 to N will be so resource hungry that it will be abandoned simple because of the complexity of using multiple networks because sites are spread across them. The very reason there is only one Internet except for specialised intranets used by businesses and governments
Its the early period where we will see if others try to compete.
And @Dimitar adoption of networks and systems always follow a “S” curve because of human nature, resource supply, etc etc. And there is nothing in SAFE to suggest that it will break the mold in that respect.
Note that the virus growth follows a “S” curve. A very small section of exponential growth while its small then continues along the “S” curve and then tappers off when adoption is getting close to everyone