I am from Europe so I may not get it, but what communication does a neighborhood do that is important? Yard sales?

Do people really participate in something like school PTA and eat often at food trucks?

I guess electronic platforms are more fragmented here in Europe. Google Maps owns business hours, various classified sites (such as Ebay's) own selling stuff locally. But everything might be different in each country really.

I think people have become more vary to post personal things online. I know very little parents that would be okay to publish pictures of their kids online (including on Facebook).