A lot of this metaverse business sounds like what Ramon Llull was creating in the 13th century with his art of memory and combinatoric wheels. Admittedly, it was a single user space, but he was creating images in his mind and then combinatorically combining them with each other to create new external/imagined ideas, thoughts, and experiences.
It gets (a lot) complicated to see this without significant background reading and experience of what he was doing. (I think even Frances Yates misunderstood some of his intention in her magisterial tome.)
IndieWeb is doing some of what he imagined, but rather than doing it in our physical brains (memory), we’re doing together from website to website in a similar communal manner.