I stopped contributing too. I'd add - overly opinionated mods - a question can be clearly popular, useful and have some exceptionally good answers, but still

I stopped contributing too. I'd add - overly opinionated mods - a question can be clearly popular, useful and have some exceptionally good answers, but still get deleted because some new mod decides years later it's not a proper question. Similar happened to cause the removal of the whole of onstartups. - No attempt to manage time and versioning. It's not a duplicate when all the answers refer to a previous OS or language version. On documentation, I really don't want sub-topics (such as say C++ preprocessor topics), especially those with many, ordered by votes. I'd prefer one of the more "traditional" documentation layouts, but with social aspects, such as voted comments, and perhaps crowdsourced explanations. So for me great idea, poor implementation - lose the format built for Q&A and try again.