Yeah so we're working on a project called Solid with the inventor of the web.  Basically there's a startup in the US that wants to give users the choice in where their data goes.  Solid has some access control options where you can choose who sees what.  We could import that into nostr one day.  What they want to do is lower the barrier for clinical trials because moving data around is one of the biggest barriers, it takes ages, lots of forms for consent, data is still sent by fax!  I think the NHS did actually do a pilot.  But Solid is a bit like nostr, actually its what I worked on before making nostr, and they are designed to fit together.  But, it's still a "we're sill early" type thing, with lots of bugs and paper cuts.  The security can be untested at times.  But ... at least it's open source, open registration, open protocol.  If it was ready I think the NHS would probs do a pilot.  But it's not quite.  Building FOSS stuff is hard...

https://solidproject.org/