4chan and 8chan, by this article's definition, have attritional interfaces, to a greater degree than Reddit. Threads are moved to the top of a board when posted

4chan and 8chan, by this article'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's settings, threads with more than N replies are "bumplocked" and cannot be moved to the top. Further, one may use the keyword "sage" in the email field to intentionally reply without bumping. This means that, without constant activity, threads will eventually die. Third-party archives exist, but the chans do in fact delete old threads.