I remember long before I started using Arch I would google something nuanced for Ubuntu and there it was on the Arch Linux wiki with a “for Ubuntu users do this” section to fix whatever my issue was, this happened multiple times.
The special instructions for other distros could be at risk for being deleted, as "something that will not work on Arch as-is is not something we will be hosting on our site".
I think one reason the arch wiki thrives is that it IS a generic linux wiki.
The arch wiki describes the upstream package.
I say this because Arch tries to use the upstream software as-is, and describes requirements and helps make configuration choices.
Other distributions tend to make the choices for you, configuring and modifying upstream to fit the distribution.
With respect to a wiki, this would be another layer of documentation to add. Describe the package, describe the distro, and explain the configuration choices.
The arch wiki could expand to support distro switching, with each distro having its own domain, and all that could link back to a general linux wiki. It'd be beautiful.
