Yes, wherever there is bare soil on the surface of a pot, I will stick a leaf or cutting & try to forget about it. The truly forgotten have a 100% survival rate... because I don't remember if there was anything else that failed. It's very rewarding!
I don't like to look at dirt, I just want to see plants when I look at pots.
Over winter, a lot of pots get a stem or 2 of Coleus added, to be saved to use in the landscape again the following spring. After I potted these 2 pineapples, I added other little cuttings all around the empty spaces between the leaves, saving a lot of space.
The tall Coleus stems in this pot will be a great start in the landscape, allowing me to start with 18-24" cuttings, not 6" plants.
A pot of Begonia cuttings, taken & put in this pot around November.
Various cuttings & leaves added to the empty space around this Opuntia. The unrooted red Ti plant (Cordyline fruticosa) tip, was a lark, but it seems to be either still alive & taking root after being there for a few months, or dying more slowly than I could imagine. I'm totally surprised.