I'm not particularly technologically adept, but I think I can see what you mean about the overlap between GrapheneOS and a future NostrOS. I would wonder if a standalone NostrOS mobile device could also be used for secure signing of desktop applications via QR, as you see with Bitcoin (as with SeedSigner)? I'm totally spitballing here, so please do feel free to tell me that I'm making no sense! Also, I would wonder if there is some potential overlap with projects like #Reticulum and #Nomadnet? From what little I have read about those, they have a decentralized network for both messaging and websites that is fully encrypted. If NostrOS were to exist at scale (using something like this desktop environment I'm using right now), you could achieve something similar to those two where people are exclusively interacting within the Nostr ecosystem, visiting one another's domains, etc. Is that kind of what you're going for? Or would there still be offramps to connect to the mainstream clearnet too?