[yellowapple]

Probably because it's generic enough to be applicable to the broader Unix ecosystem. I refer to the Arch Wiki all the time even though my Linuxen are almost exclusively either Slackware or openSUSE.

The downside, though, is that some distros have specific tooling for solving a problem, and that tooling is often more appropriate than the information in the Arch Wiki (though the AW still helps if you want to understand what those tools are doing and why).