You raise a good point - my example of asking if the user likes cats is something that could be an inferred metric based on their clicking on cat pictures and h

You raise a good point - my example of asking if the user likes cats is something that could be an inferred metric based on their clicking on cat pictures and having lots of pictures of cats. It isn't the user data itself which Solid aims to control. Trying to subdivide pods so that services map access from album A -> pod B and album B -> pod C sounds like a painful UX problem as well.. Do I place my ambient music in my music pod or my "office music" pod? Do I have a hierarchy of musical pods? I am joking a little, but it is a hard thing to have fit into an easy flow.