I find the visualization of code as nodes like UE does for blueprints to be fascinating. It lets one see how functions fit together in a piece of software. Now, in the case of UE, these are turned into a pseudo compiled script, but I find it interesting that apparently no such visualization tool exists to see regular c++ code this way. Possibly I just don’t know the right question to ask of a search engine to find such a thing.
It would be a great tool to use for new people to show them how data flows through a complex program.