There is also a good alternative called TiddlyRoam, that icludes graph view of your connected notes.
The org-roam-server visualisation are really useful for me, since it makes it easier to see what areas have sparsity in them and should be expanded upon. Plus it gives me something more tangible to look at to understand how my research is expanding, there's a bigger sense of "building something". https://github.com/org-roam/org-roam-server