Vanilla OS is built on Debian sid, which follows a rolling release model rather than Fedora's point-release approach. We achieve immutability through our own ABRoot implementation, which directly leverages OCI container images under the hood, unlike OSTree. Vanilla OS is also reproducible, whereas Fedora requires you to place trust in its build infrastructure. Additionally, with Vib (Vanilla Image Builder), anyone can customize their own system image, or even create their own distro with minimal effort.