At first, I thought someone here had it out for me (I have had too many negative experiences at other wikis) but I quickly realized that the content had simply been moved to a new page called "OAM layout." If you move (rename) a page in MediaWiki, it considers it a different page.This page is requested for deletion review by a moderator.
https://snes.nesdev.org/wiki/OAM_layout
I suggest adding a "reason" field to the MediaWiki software that is appended to this deletion review request so that in the future wiki editors are not flabbergasted by this message.