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The Bizarre and Complex Story of a Failed Wikipedia Software Extension
metasonix writes Originally developed by Wikia coders, "Liquid Threads" was intended to be a better comment system for use on MediaWiki talkpages. When applied to Wikipedia, then each Wikipedia talkpage or noticeboard would become something resembling a more modernized bulletin board, hopefully easier to use. Unfortunately, the project was renamed "Flow" and taken over by the Wikimedia Foundation's developers. And as documented in this very long Wikipediocracy post, the result was "less than optimal." After seven years and millions of dollars spent, even WMF Director Lila Tretikov admits "As such it is not ready for 'prime time' for us."
>...taken over by the Wikimedia Foundation's developers. ... After seven years and millions of dollars spent, ... "As such it is not ready for 'prime time' for us."
I assume the Wikimedia developers kept reverting each other's checkins for various reasons such as "Commenting needed", "Not codeworthy", and so forth. </tongue-in-cheek>
The article summary speaks of "millions of dollars spent" on a new discussion system for Wikipedia. The article actually tells a very different story -- the LiquidThreads extension started out as a Google Summer of Code project, was funded for a while by an interested third party, and then received a little attention from the Wikimedia Foundation (one designer, one developer) before development was put into maintenance mode. I would ballpark the total money spent around $100-$150K max. Elapsed time does not equate money spent. LQT continues to be in use on a number of projects, but its architecture and UX needed to be fundamentally overhauled.
Flow, the designated successor to LQT, continues to be in development by a small team, and is gradually being deployed to appropriate use cases. It is now running on designated pages in a couple of Wikipedia languages, and old LiquidThreads pages are being converted over using a conversion script developed by the Flow team. Contrary to the article's claim, WikiEducator upgraded to a recent version of LQT, and will be able to migrate to Flow in future using the conversion script.
You can give Flow a try in the sandbox on mediawiki.org and see for yourself whether the article's claims are hyperbole or not. Disclaimer: I am the person referenced in the headline of the Wikipediocracy article, so take my view with a grain of salt, as well. ;-)