I really think Obisidian could benefit for the graph from the amazing Org-roam project, which is open-source roam alternative for emacs.
org-roam/org-roam-server: A Web Application to Visualize the Org-Roam Database
Here’s a short video I recorded
here’s a better .gif with more of it’s excellent features. (from the original repo)
Most important features to use as inspiration:
- sidebar note
- quick hover preview
- different colors