I could have sworn that there were over 360k posts in the Oblivion section and 206k posts in the Morrowind section yesterday. Today there are about 243k posts and 112k posts in the Oblivion and Morrowind sections respectively. So a bunch of posts disappeared out of those sections.

Has anyone else noticed this or am I remembering things that are not there?

Every few months the system admin prune old threads.