Nov 12 2019 07:49 AM
I can see a use for the ability to have collections inside of collections.
First one that comes to mind is recipes.
└───Recipes
└───Beef
├───Stew
│ ├───RecipeSite1
│ └───RecipeSite2
└───Crockpot
├───RecipeSite3
└───RecipeSite4
Tags could possibly satisfy this as well.