That is my point though. Not every Unix system has a package manager. But almost every Linux distribution does.

That's even one of they key attributes that makes differences between distributions: the package manager. Other major ones include the init system, and whether the distro is rolling release or not.

Well, if you want to be precise … Linux is a kernel.

And the OS is called GNU/Linux.

/me ducks

Linux isn’t really a UNIX, though.

Isn't Linux an anagram (no not an anagram but I can't come up with the right word) for Linux Is Not UNix?

https://acronyms.thefreedictionary.com/LINUX

You might be thinking of GNU, which is a recursive acronym that stands for "GNU's Not Unix".

As far as I understand it we got the name Linux because Linus Torvalds was quite bad at naming things. :)

https://en.wikipedia.org/wiki/Linux#Naming

No, that’s GNU with the “not UNIX” recursive acronym. Linux was named by the guy who first hosted Linus’ OS and was an amalgamation of “Linus” and “UNIX” (“nix” was a popular suffix for platforms of that type back in those days so “Linux” was a play on the authors name in the style of that naming convention).

If I recall correctly, Linus originally wanted his OS to be called “Freenix” because he thought naming it after himself was a little vein.

It's a recursive acronym.

Backronym?

For all intensive purposes, it is.

I think the expression might be "for all intents and purposes".

I hole-hardedly agree, but allow me to play doubles advocate here for a moment...

goddamnit, well played :)

Intents and purposes

really?