@cwebberChristine Lemmer-Webber
@evanEvan Prodromou
@kopperkopper
@hongminhee洪 民憙 (Hong Minhee) 
I may be naive and am not an expert here, but in my musings on a protosocial AP extension I imagined a clean separation of "message bus" where you'd want closed-world predictable msg formats defined by some schema (perhaps JSON Schema or LinkML). These msgs would JSON-LD formatted but validated as plain JSON.
And then there would be the linked data side of the equation, where a semantic web is shaping up that is parsed with the whole set of open standards that exists here, but separate of the message bus. This is then a hypermedia, HTTP web-as-intended side. Open world and follow your nose, for those who want that, or minimum profile for the JSON-only folks.
It occurs to me these require separate/different extension mechanisms, guidelines and best-practices. The linked data part lends itself well for content and knowledge presentation, media publishing. While the msg bus gives me event driven architecture and modeling business logic / msg exchange.