I'm not familiar with urbit, however, we built a system that works you can deploy Virtual machines, kubernetes clusters in less than 1 minute. And you can fully run / replicate that system on your own terms

https://manual.grid.tf/playground/vm_intro.html https://manual.grid.tf/playground/k8s.html

Also, we spent lots of times to bring developer's favorite tools like terraform, pulumi, typescript libraries to make everything familiar.