All it takes is for any of the clients like Amethyst or Primal to provide relay service directly from their Android apps.

Tens of thousand relays coming up overnight. Not that I mean that all relays should be public to the world, but they would certainly help to keep a good backup of what happens. For example, I would enjoy downloading the texts from the people that I follow, don't have particular interest in the whole world but would be nice to replay the conversations here some 20 years in the future that I've saved on the phone. 

 an option https://github.com/CodyTseng/nostr-relay-tray 

 Many thanks, that looks fantastic. Went ahead to install but I'm running Linux and for some reason doesn't want to show on my tray. I've message the author, see if this can be solved. Now just missing to convince the relay authors to save the events as text files, otherwise we won't be able to rescue/port the data afterwards. 

 they are saved as jsonl, you can import on coracle, nostrudel. Backup site like https://backup.greenart7c3.com/ 

 Learning lots  of good things today. Thank you!  

 Meshtastic p2p mesh radio network works like this. Every user radio device is automatically a node and a relay. The subnet size that each node can see is the range of the radio and the density of handsets in the range. Replicate that on the internet. Bittorrent essentially also works the same way, each client is a node and relay with the throughput (and also maybe the reach/domain  size?)being configurable. 

 Yes, that might help.