In its current form, I'm using it as a planning/documenting tool. It has helped me break down problems/tasks because it forces you to start with the desired goal.
I'm not really sure where to go with it at the moment so I wanted to show it off and look for feedback and/or ideas. The main use case I keep coming back to is for onboarding developers at new jobs; in my experience it's always been an adventure getting the project(s) up and running when joining a new company.
All graphs: https://tvfn.io/app/browse An exampe: https://tvfn.io/app/graph/4