ObsidianOS is an Arch-based Linux distro with an A/B partition style so if a package has a breaking change that causes some issues, you can just reboot into the other partition and restore the other one, while relying on the robustness of EXT4.
HoloISO Alternatives
HoloISO is described as 'SteamOS 3 (Holo) archiso configuration' and is a Linux Distro in the os & utilities category. There are more than 50 alternatives to HoloISO for a variety of platforms, including Linux, Self-Hosted, Windows, BSD and Arch Linux apps. The best HoloISO alternative is Linux Mint, which is both free and Open Source. Other great apps like HoloISO are Ubuntu, Debian, Fedora and Arch Linux.