That article wouldn't be deleted, because I can find 20 or so references in paper publications saying things like "The Stack Exchange family of websites is a Q&A service for developers and other technical roles. If you’re stuck on a problem, the chances are someone else was too and turned to Stack Exchange for help", or in some cases doing a quick bio of Jeff Atwood or mentioning codinghorror.
Hmm, OTOH I can also find multiple paper references to perlmonks, such as "Perlmonks is a web bulletin board dedicated to Perl. It’s not specifically a help desk, but if you’ve done your homework and ask a good question, you’re likely to get top-notch help very quickly" - that's from the O'Reilly Perl book. Sometimes I'm overoptimistic about these things, because I want to keep every obscure article.
Well, Perlmonks is still mentioned on the articles for Perl, Outline of the Perl programming language, Perl language structure, and Perl Foundation. (This is because deletionists are lazy and don't actually like doing a thorough job.) So I could see Perlmonks becoming a redirect to one of those pages, which could describe it in a section. Similarly, if Stack Exchange faded into obscurity, it might be rolled into a section of Jeff Atwood's page (or vice versa).
I searched it, the site is down The Wikipedia article is deleted
This is pure loss of information somehow.
I and a lot of other people in the future will never know what "perlmonks" is/are, how important it was?, etc. etc.
The logic seems to be: if tomorrow Stack Exchange disappears, the Wikipedia article will be deleted? If yes, then that makes zero sense.