Ah, thanks for the correct term. I am not sure the specification is open enough for other operating systems to support it, which is what I meant.
Among my acquaintances, I can count Apple users on a single hand (<1% of the people I know), which severly limits the usefulness of the network.
There's OWL [1] which looks promising on Linux. I hope Android devices can get something soon. I'm still a bit confused by how Linux drives Wi-Fi radio, and what is and isn't implementable in software: could older Android devices gain support for NAN and OWL through a software update? What about old computers with old Wi-Fi cards?
I first got aware of Wi-Fi NAN by chatting with neilalexander on #yggdrasil:matrix.org :)
It looks promising for advertising capabilities to nearby hosts, allowing to negotiate p2p connections.
