Lately I've been running VanillaOS to improve the Linux desktop experience by isolating the root operating system in an immutable boot partition using abroot and installs all applications in userspace via containerization.

This affords the user better security but also better UX since users can install apps from any package manager (snap, flatpak, AppImage, nix, apt, dnf, pacman) thanks to apx which installs and seamlessly integrates apps into distro-specific containers.