Thank you! That page addresses the question only in the one quoted sentence, "In 2015-2016 the site underwent a steady decline of activity leading some to declare the site dead.". This page, which I found via the link in the parent, says much more:
I suspect it's connected to the political rejection of post-modernism (in its actual meaning, not the politically loaded meaning) and with it the Enlightement ideas of reason/rationality (replaced by 'winners' - brazenness and aggression), fact (replaced by 'post-truth'), intellect, universal rights and humanitarianism (replaced by nationalism and reactionaryism), and through those things the power and obligation of humans to better their world and themselves. That rejection was widely normalized, I suspect, in the election of 2016, IME. A problem with talking about these things is a factual basis.
https://www.lesswrong.com/posts/MKrrnrCDv6zm4SL9a/why-hasn-t...
I suspect it's connected to the political rejection of post-modernism (in its actual meaning, not the politically loaded meaning) and with it the Enlightement ideas of reason/rationality (replaced by 'winners' - brazenness and aggression), fact (replaced by 'post-truth'), intellect, universal rights and humanitarianism (replaced by nationalism and reactionaryism), and through those things the power and obligation of humans to better their world and themselves. That rejection was widely normalized, I suspect, in the election of 2016, IME. A problem with talking about these things is a factual basis.