Hello!
In history only important event, or comments with great relevance were keep into books. Like battles, memorable speech, conquest and destruction which only the victor should only write.
There were cases where the other side, had their own version, but were mostly a rejected source. If you take history into account the books only had important things, but not all cultures decided to save things on books.
So with my TL;DR i am trying to say is, that we should leave those who want to save the messages they want, by themselves or in the books (WIKI)
Books didn't saved whatever people said, but just important event, so if we are to having the save (something) feature, it should be for important things, because it how always is.
The Wiki is the place to save important things of each realm's history, because if your realm is destroyed, it doesn't matter how many years of messages you have stored, it will be USELESS. Unless you want to discuss at some point who was the lord of X region of X realm on X time.
peace!
Published books maybe. This feature is more of a correspondence journal. That is why Historians LOVE finding such sources of information, since they contain the day to day stuff that helps better understand the realities of a time period.
