The way SO is moderated encourages out of date information.

For example, if you find a question from 2015, with all out of date answers, if you ask it again today it will be flagged as duplicate with a link to the 2015 answers and no further discussion is allowed. The older SO gets the worse the content gets.

They're trying to make a "Wiki site" but in a Q&A format, it doesn't work and doesn't make sense. Until they realize that their moderation policies are going to keep driving away questions that would warrant modern/fresh answers.

For example try searching SO but set your Google to only show content from the last 12 months, the results are simply low quality with half mod-dead. Most of the good content is from two years ago or more, back before the site switched from Q&A to "confused Wiki-site."