Wiki would be at least of some help. My last job had no documentation about processes at all, current one has a wiki, but it's outdated in many places, because

Wiki would be at least of some help. My last job had no documentation about processes at all, current one has a wiki, but it's outdated in many places, because massive effort was put to get it running, but then it was marked "done!" and nobody really cares for updating it. But officially we do have wiki, so there, we're organized now.