100% correct. It pains me but restricting to a tree was a compromise I wanted to make. Why? Because visualising a graph in a concise way is difficult. The point of jumproot is to have very broad and deep document structures and visual graphs simply don't allow it (to my standards anyway).

I'm always on the lookout for a widget that allows me to display a large graph in a very dense way. Please let me know if you come across one.