A more technical use case that I liked was a system that can analyse the configuration of resources across and entire network and find a "path" from a normal user account to a full admin privilege.

Something like: "Helpdesk user A can reset the password of a service account that can write to a file share that contains a script that is run on logon by every user including the full admin, allowing user A to trigger an action in the context of an admin B, making them equivalent to an admin."

You map out "things" on the network like file shares, security groups, accounts, etc... with links between them, and then ask for the shortest path from A to B.