Lately I’ve been thinking about small VMs, thanks to Uxn. Long-term sustainability and portability interests me, and doing something similar (a small VM for the tools I’ve written) is intriguing.
At the same time, I’m not sure a VM would be a good enough fit for my tools (particularly the web frontends), so if I do anything in this space, it’ll probably be either just for fun or a more-specific VM (focusing on something like generative art).