Provide a way to take two IDs and determine if there is a relationship between those two IDs? The Find My Relationship capability is outstanding for finding my own relationships. My guess is that the logic used in that capability could be easily adapted to finding the relationship between any two IDs. When showing the usefulness and power of FamilySearch to someone else for the first time, it would be amazing and eye-opening to be able to take any two people in the database and show their relationship.
Relative Finder (https://www.relativefinder.org/#/main) is a third-party site/app that can tell you the relationship(s) between any two profiles on FS's Tree. The programming and processing involved is ...non-trivial.1
Thank you so much for this great compliment to familysearch.0