Mass market products are rarely best in class, they are all about offering 'good enough' at commodity prices. Unix won because it was cheap, widely available and got the job done.
Edit: I've changed the link. Thanks for letting me know about the bad redirect, golergka. The jwz link looked fine to me; it's pretty obnoxious if the site does a NSFW redirect.
Wikipedia has an objective and some structure, whereas HN is, for all its uniqueness and value, not an organized activity.
Heh, and while writing this it dawns on me that it may well be that he is about OSX because UNIX. Meaning that OSX is a BSD derivative, that in turn is derived from the historical UNIX. While on the other hand Linux is just a bastard clone.
Because it hit me that i have seen some similar fervent anti-Linux sentiment from other UNIX people, related to either the BSDs or Solaris.