What if instead of booting a live system to install another one, we booted from the ISO into the installed system and saved it to disk in the background while already using the system. I call it prêt-à-booter image, and I have made a demo for GNOME OS.
www.youtube.com/watch?v=3gG9...

Could you tell us what applications did not work?

A screenshot showing GNOME Initial Setup on GNOME OS in a VM

Finally, I have managed to make an hybrid ISO live image of GNOME OS that uses the same UKI and /usr partition as the main image. That is without using dracut. So now we will be able to test GNOME OS on Boxes without going through the installation.

I have heard that to exit Civilization VII, you have to type :q!

One interesting thing is that some VMs still provide installation mediums through a virtual SCSI CDROM. That means Linux distros need to have a kernel with CONFIG_BLK_DEV_SR. Even on aarch64. Has anyone ever had an ARM laptop/desktop with a CD drive?