That UXN thing looks like it could be trivially jitted on-the-fly. Unless I am misreading their site, and the code doesn't have to reside in the ROM, of course.
Jealous of the access to Oxide Computer. I would love a rack for myself, but don't have the hundreds of thousands to spare. Or three-phase power.
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Notably this post got his recommendation rescinded from the Varvara resources README: https://git.sr.ht/~rabbits/uxn/commit/4adbd95fe226169a634131...