I've made some progress on my port of #uxn to the wioterminal: https://github.com/oschettler/uxn-wioterminal/ Console programs work. Uxn now is a Git submodule. I've also added a small machine code monitor for me to learn uxntal.
Wikipedia calls them "a lost art". I remember having written several ones for my homebrew 6502 SBCs in the 80s :)