Does the Similar Threads widget take advantage of ElasticSearch functionality?
Yes. The similar threads widget basically contains the top x results (set in the options for the widget) that you would get if you searched Threads through the advanced search from XenForo using the thread title as your search term and checked "search titles only".
Yes. The similar threads widget basically contains the top x results (set in the options for the widget) that you would get if you searched Threads through the advanced search from XenForo using the thread title as your search term and checked "search titles only".