Arch Linux made declarative, immutable and atomic. With Android app support and Fedora, Debian, CentOS Stream and Ubuntu containers available, as well as system packages/DEs/kernels from Arch Linux and the AUR.
Flatpak applications are supported out-of-the-box, and so are Arch Linux & AUR packages through the /system.yaml file. Support for applications from Android, Fedora, Ubuntu, Debian and more can be enabled through the System app on blendOS.