The wikimedia wiki is used for documentation and discussion on the topic of running a wiki, and on specifically running MediaWiki (the underlying software that powers these sites).
Since this is an article about a topic relevant to running wikis, it's on the meta wiki. It is unlikely to be notable enough to meet the criteria for being included in Wikipedia; in order to avoid everyone creating their own personal Wikipedia page or a Wikipedia page for their high school band or the like, which can be very hard to ensure is high quality and accurate, Wikipedia has notability and verifiability requirements. Something must be notable enough to have been published by several existing reputable sources in order to meet this guideline.
It's fairly likely that Cunningham's Law does not meet those criteria. But the Wikimedia meta-wiki has less formal requirements, and its topic is explicitly discussion about running wikis, so this winds up there.
If you click on the logo, you can see this described straight from the source: https://meta.wikimedia.org/wiki/Main_Page
"Welcome to Meta-Wiki, the global community site for the Wikimedia projects and the Wikimedia movement in general. Meta-Wiki's discussions range from coordination and documentation to planning and analysis of future Wikimedia activities."
The first step is to read the article at https://www.mediawiki.org/wiki/Help:Extension:Translate/Page...
The complete list of steps is at https://commons.wikimedia.org/wiki/Commons:Preparing_a_page_...
Sorry, I didn't realize it was so complicated to do this.
https://meta.wikimedia.org/wiki/Cunningham's_Law#Russian_Tra...
Why? Wikipedia is an encyclopedia [1], there is no need to keep the amount of pages low, storage is cheap and no one prints out Wikipedia on real paper.
The "not notable enough" is a real threat to Wikipedia and the future of the project. The German Wikipedia already lost a lot of former authors (volunteers) because of admins gone crazy. They don't want anyone to edit "their" pages, and revert and ban almost every new edit/user. You can read about this serious situation on Heise.de [2]. Read also the 650+ comments of the related discussion [3]. The English version is still better in shape, but it moves in the same direction, unfortunately.
[1] http://en.wikipedia.org/wiki/Encyclopedia
[2] http://www.heise.de/newsticker/meldung/Blutet-Wikipedia-aus-... ; Translation: http://translate.google.com/translate?sl=auto&tl=en&js=n&pre...
[3] http://www.heise.de/newsticker/foren/S-Blutet-Wikipedia-aus/...
Edit: I am not against "notability requirement", with a better balance it's fine. Wikimedia Foundation should have a closer look at the German branch... maybe resetting all "admin" privileges would help?
Gwern's page, In Defense of Inclusionism[1] has a good summary of both sides, and argues all of the points I would make.
[0]: http://meta.wikimedia.org/wiki/Deletionism [1]: http://www.gwern.net/In%20Defense%20Of%20Inclusionism
It's a tough balance to keep; I don't pretend to have a good answer for how to steer it in a better direction. I have been an off and on contributor to Wikipedia for years, but never enough to get involved in the politics or become an admin.