Exactly. The Edge “UPDATE” points to a new version of that node and keeps rolling.
It’s like a “Ring a Ring o’ Roses”, “that does not close”. That way you would maintain a historical relationship between these nodes. Since the “Root” Node is the original. I would say that a better example for this would be like a “chain” (blockchain).
In this logic you would always look for the “Root Node” and use “Recurse Query” to expand the relationships (in loop) of this chain model. You could relate the “Root Node” direcly to a user for example. And expand from there.
And in the case of writing (mutate), it would be like Bitcoin does, it takes the previous “block” and links it with the block to be generated.