Also there was some work done back in 2015 to use the NetBSD hier and illumos user land to start down this path . It was even shown to work back in 2006 using S

Also there was some work done back in 2015 to use the NetBSD hier and illumos user land to start down this path . It was even shown to work back in 2006 using Solaris 10 and a super minimal install . I think both sites are long gone and someone would need to dig around archive.org to find it .