Back when I was preparing to become a librarian (academic research or possibly a medical archivist; before I got sucked into the software engineering vortex), I spent a fair bit of time talking with my coworkers and professors about the relationship between rapidly-mutating secondary (tertiary?) sources, such as Wikipedia and blogs, and actual primary sources based on actual hardcore effing research. The c2 wiki did not once ever come into the discussion, because nobody cared about HowComeLispAndSmalltalkAintPoisonYet or DoesRelationalRequireTypes. It was too alien a culture.
I think the author is on to something, that the Wikipedia culture of anal-retentive editing and (worse yet) knee-jerk "[citation needed]" has been bleeding the spontaneity out of the popular concept of wikis, so people are much less inclined to just post stub documents and collectively flesh them out as time allows. Often, the expectation that writing ends up polished prevents it from appearing in the first place. (Documentation or otherwise.)
I've successfully pushed for a wiki literally everywhere I've worked through the last decade (including the library system, which has a great and actively maintained collection guide, based on mediawiki). Sometimes it took offering/threatening to run my own server specifically to host one, and it's always taken some content-seeding and nudging to get things in motion, but the net results have always been positive.