Excellent Tiffany. You should submit it as an article.
Callisia fragrans is a plant I grew up with. I did not think of why my urge to combine plants all the time until you reminded me of my Mom put that plant in every pot in the house. It was in hanging baskets, it was in the pot with the peace lily. Because someone would always knock a piece off and she would say "No Problem" and stick the broken piece in another pot. She used it as a hanging plant, and as a ground cover around other plants.
I have very few single plant pots. It is mostly because of age and not enough room. I do not want to carry a bunch of pots in for the winter and I do not want to have to water that many pots. I am too busy to and to lazy to water pots, empty saucers, wipe up water under hundreds of pots.