This may just become my next most favorite project on GitHub!
For anyone who would create their own OS, or just experiment with other OS'es, this could be a godsend!
The set of ideas which gives rise to this tool are brilliant, and while I haven't reviewed all of the code for potential security implications (as I would want to if I were deploying it to a production server in a business environment) -- it looks very well thought out at first glance!
Extra kudos for having a flake.nix (for us Nix users!)
(If you're using NixOS or the Nix package manager, you can download it here https://search.nixos.org/packages?channel=25.11&query=quicke... , i.e., "$ nix-shell -p quickemu")
And extra extra kudos for having Alpine, Nix, ReactOS, TinyCore and OpenBSD as downloadable OS choices!
In the future, I'd love to see Windows XP, Windows 2000, and Windows NT too (assuming that Microsoft would permit that!) -- but that would just be the icing on the cake!
Short review: There's potentially something for everyone here! (Well, any OS person! Could Minix 3 be added in the future? :-) )
Long review: Will definitely have to watch this project in the future, to see where it goes!
LXD manages qemu VMs and supports snapshotting, live migration, and a number of storage drivers: https://news.ycombinator.com/item?id=45270468
virtio-gpu-rutabaga works with Android VMs on qemu, but does it work with Win/Mac/Lin: https://news.ycombinator.com/item?id=42921315