It's useful for borrowing a car seat, getting recommendations for plumbers, electricians, etc, advertising extra garden produce we wish to give away, and so forth. Otherwise, I stay off of it.
Also from a technical and UI perspective, the web site is atrocious. It loads terribly slowly on a current generation iPad, constantly tries to route you to its app, makes it way too easy to accidentally interact with a post or comment, defaults to "top posts" instead of "recent activity" and on and on. It's barely any better visiting on a desktop.
I much prefer the sub-reddits, city-data forums, and even FB groups for my area for keeping in touch with what's going around me.