[maleldil]

Not just Arch documentation. It often has general use information, too, applicable to other distros and Unixes.

[collyw]

Arch has some of the best documentation for Linux in general. I ended up there a lot for a Manjaro install but it has solved issues on Ubuntu machines for me. Always pretty obscure stuff.

[kelnos]

Agreed! I've never used Arch, but the Arch wiki often comes up in search results when I'm looking to solve a problem, and it's usually very helpful.