Surprised to see no mention of Urbit, which sits somewhere between Uxn and Linux. Holding Urbit's OS in your head would certainly be more challenging than Uxn,

Surprised to see no mention of Urbit, which sits somewhere between Uxn and Linux. Holding Urbit's OS in your head would certainly be more challenging than Uxn, but it's still doable. When something breaks, you can actually fix it yourself (I have). That's a refreshing feeling.