I was just thinking it would be great to have something like that! Especially if you could opt in to share it with visitors, if they have a bulletin board & letters, I think a journal would be okay, it’d be amazing for story based towns.
I used the journals a loooooot as a kid, and I plan on going back and rereading them sometime soon just to see what was up in my life at that point! I would love to see them make a return, tbh! Though I doubt I'd actually still use them as an actual journal. I'd probably just use them to store little notes about my plans for my town or things I need to remember to do for my villagers, etc.