I have done this as zig makes many breaking changes often, not because new features come out all the time (almost all of the things showcased on the site if not all were around back in 0.6). I do not want to teach people things that are already for the most part outdated. Things move very fast, especially in the standard library.
edit: to clarify I am the maintainer/owner of ziglearn
nod From my other replies, it would be of assistance to state that this on the guide right at the Install section, as I did have a choice which zig to use and chose the simple package from my repo given no further direction. (BTW: could you explain why I should install ZLS in step 4? Since we're here.. :) )
With a line of text that I must use the latest dev/git code (etc.), my choice would have then gone the other direction to just download a binary. The number of websites which "just download a binary" when a suitable package is already available in the repo are a very high number (for Arch), so this thought process is standard for a guy like me.
edit: to clarify I am the maintainer/owner of ziglearn