Complete Guide to Downloading and Using the Obsidian AppImage

It is a "one app = one file" format that runs on most distributions, including Ubuntu, Fedora, and Arch.

You can keep multiple versions of Obsidian on your system simultaneously to test new features or maintain stability. How to Download the Obsidian AppImage Install AppImages on Arch Based Linux - DEV Community

You can run it without administrative privileges.

Because it bundles all necessary dependencies, it avoids "dependency hell" where system updates break your apps.