4chan and 8chan, by this article&#x27;s definition, have attritional interfaces, to a greater degree than Reddit. Threads are moved to the top of a board when posted on; when this happens, all other threads are pushed down. This happens so quickly that, effectively, threads are ordered by their activity. When a thread hits the bottom of page 10, it is deleted, and depending on the board&#x27;s settings, threads with more than N replies are &quot;bumplocked&quot; and cannot be moved to the top. Further, one may use the keyword &quot;sage&quot; in the email field to intentionally reply without bumping.<p>This means that, without constant activity, threads will eventually die. Third-party archives exist, but the chans do in fact delete old threads.