There has been a blog post published back in 2022 about hierarchy vs graph in Pods: Let’s talk about pods | Ruben Verborgh. It sparked wide enthousiasm (including mine), but also some pushback and unfortunately didn’t really make it into Solid mainstream.
The article must have been a product of deep understanding of the topic, and made a lot of intuitive sense to me. Perhaps LWS WG, with Ruben’s involvement, may revisit and bring back those ideas.