@rwg @hugh Pragmatically speaking, that's true because people needed to build/show something. But there are gaps in the specs such that broad interop is technically not possible as it stands ( https://w3c.social/@csarven/114178482096355457 ). I'm not saying this to dismiss any work (especially one I was involved in since the days of Laconica/StatusNet). I'm coming from the perspective of how different classes of products can interoperate, regardless of the umbrella or spec "camp" they're part of on the web platform.