My prime use would be generating diagrams of function call chains in large Python code bases.
i found vijual[1] and mermaid-ascii[2] are good starting projects.
[1]: http://www.lisperati.com/vijual/ [2]: https://github.com/AlexanderGrooff/mermaid-ascii
FWIW it is called evolutionary or lineage (or hierarchical lineage) diagram I believe.
My prime use would be generating diagrams of function call chains in large Python code bases.