Some threads are very good. We all like these threads, and it's sad to see them 404. To save the memories of particularly good threads, we're introducing The Archive.
Mods now have the ability to save an entire thread to the archive, which gets moved there after it gets bumped off. We may also delete irrelevant replies from archived threads, since they're not what's really being archived.
We're not going to save every thread, only a few good ones.