I am told that the SmartOS people have this sort of idea.

* https://wiki.smartos.org

> SmartOS is a specialized Type 1 Hypervisor platform based on illumos.

On Solaris? Why? And why bother with a Type 1 hypervisor? You get the same practical security benefits with none of the compatibility headaches (or the headaches of commercial UNIX necromancy) by containerizing your workloads. You don't need a hypervisor for that. All the technical pieces exist and work fine. You're solving a social problem, not a technical one.