> Like, there's a type of socialization that only works based on geography

There are also local newspapers. I do understand Nextdoor's motivation here, but it does seem a little odd. Journalists typically get stories by talking to people, and local journalists by talking to local people. Nextdoor is a specific avenue to do exactly that. And half the complaints on Nextdoor are things the author would probably love to have featured in the news (though hopefully they won't be, no-one needs to encourage the NIMBYs), and might be ones that would benefit from a reporter investigating them.