Audrey, the experiment is going okay. As to be expected there have been losses, but overall they are surviving quite well.
I currently have 2 experiment pots, with neither getting very much natural light at all. In one pot I had 5 semps, an agave, and an aloe plant. Two semps died a while back (this was the first pot to experiment with, before I learned to underwater them severely). And in the other pot, I had 22 semps. Five have died, but the rest are doing quite well. It appears some cultivars are much better suited to indoors than others. Unfortunately, I can't say for sure which those might be specifically, since nearly all of my experiment plants are NOIDS.
However, one that is doing quite well indoors is Purple Beauty.