I remember people used to say, "Emacs is a nice OS, what it lacks is a good editor". While reading the Ultimate OS paper I was thinking about Emacs. It already exists.
Shame google didn't use it instead of Android, they had to invent Go to get back some of the AOS advantages.
https://en.wikipedia.org/wiki/Bluebottle_OS https://www.research-collection.ethz.ch/handle/20.500.11850/...