Benefits of adding links to properties?

I love the idea of properties for key:value pairs, and think they can be even more powerful when the value is a link.

Then, instead of a raw link between two blocks or pages, you have a kind of metadata on the link.
e.g. ‘parent’

But is there any use made of this extra information? Can you visualise or learn from it?

(Some more discussion here)

Here’s the first Tana semantic link (“part of”) discussed