[vinceguidry]

The framework can be extended for new types of object.

[naasking]

But why build the core on a DAG when it's clear that cyclic references are everywhere?

[vinceguidry]

Because non-acyclic graphs aren't addressable.

[naasking]

I don't see why not, as long as you specify a preferred root and relative path from that root.

[vinceguidry]

With cycles in the graph, there's no single path to each node, no matter where the root is. Multiple paths to a node is the exact opposite of addressability. As an example, try to devise an algo for enumerating nodes and their paths from root.