This was WebID which became WebID+…
This was WebID which became WebID+TLS and then Solid.
It's not got a lot of traction yet, but a belgian region want to use it, and there is a w3c group trying to make it a REC, which will hopefully happen by 2026.
I'll take the best part of it and port it to nostr, with #nip98 and nosdav