Just reading through the FAQ here…
How do I find relays? What happens if I’m not connected to the same relays someone else is?
You won’t be able to communicate with that person. But there are hints on events that can be used so that your client software (or you, manually) knows how to connect to the other person’s relay and interact with them. > There are other ideas on how to solve this too in the future but we can’t ever promise perfect reachability, no protocol can.
I guess we (Yarn.social) do much better here in terms of reachability. In fact we do way better in terms of discoverability too. Once a pod is spun up, you can pretty much @-mention any other Yarn.social user and your post will appear in their timeline instantly thanks to WebMentions 👌