PM is a crotchecy old site ... sometimes an extremely hostile one ... and yet it is (IMHO) the “Go-To site” concerning the Perl language. It has, in addition to its regular daily activity, an enormous archive of previous posts, and a good search engine. That’s why you come here, and that’s why you come here.
PM is also an excellent code-writing service. Post the bare sketches of an idea of how to solve a problem, and in a matter of minutes or hours several Monks will have done your work, or your homework, for you. Probably in several different ways. (This in spite of the occasional riposte that “we’re not a code-writing service!!”)
Seriously, social-media sites are great for looking at pictures of fuzzy cats, but they are not “purposeful,” and they do not maintain a subject-oriented archive. They exist mostly so that advertisers can find out what you’re having for dinner ... as you’re having dinner.