I'm really liking the look too, especially as some of these fill in more!
I didn't see your comment originally, sorry. ("I guess only certain types of plants can convert their roots into shoots once they escape from the pot.") Some of that may happen, but all of the plants coming out of the side holes at this point were stuck in there, cuttings. Most of them take, a few have not. I haven't noticed any difference in the success rate of these plants vs. doing them traditionally, on/in the surface - either rarely fail.
Wherever there's remaining space, I've poked more holes, a lot yet unused. No reason to let stems in the ground get frost bite if there's room for them "on" a pot. I should have a TON of material to decorate the yard with next year as a lot of these will be overcrowded by then. Being able to use all of the pots I have that were designed for hanging, by making new hanging arms for them with wire, there's apparently 42 hanging pots here, I counted the other day.
You can see some of the longer hanging arm things I made.
This pot is one of my favs, shown above, the Hemigraphis is doing fine now.
This looks like plants are exploding, I think. Some of the leaves on the sunny side are getting a little burned since not all of the pieces were used to that much sun before being stuck there, although this plant is fine with it, just not suddenly. Also, the angle of the sun has changed dramatically the past few weeks, coming farther into the porch (south-facing) and staying longer. They'll get through it.
Here's one showing a hole I snipped bigger with scissors:
