@volanar you can see posts’ edit history and restore different edits as admin. You can even see who edited it. What’s in the plugin you are talking about is already in core, most likely why it’s outdated or something.
Something i talked about ages ago was a plugin that enabled geotagging for threads so that threads could be searched/browsed on a map like craigslist. This would require lots and lots of hours but at this point i think the community has grown and may consist of enough supporters to make it possible.