> Regarding guides specifically, FreeBSD has exceptional resources: FreeBSD Handbook …

Ahem.

<https://www.reddit.com/r/freebsd/comments/1rpnd05/comment/o9...> for the ZFS chapter "… telling people to do the WRONG thing, …"

<https://www.reddit.com/r/freebsd/comments/1ru0k9u/comment/oa...> for the ports chapter "… misleading, it was wrongly updated: …"

– and so on.

> … the project's documentation is a gold standard IMHO.

Documentation certainly is not gold standard. I'm a former doc tree committer, familiar with many of the bugs …