That's what capitalism does – it isolates individuals and destroys communities. No wonder why so many people are befriending AIs and there's a "loneliness epidemic" going around.
When it comes to physical communities (e.g. neighborhoods), I think about some neighborhoods in São Paulo that are being destroyed by buildings and construction sites everywhere [1]. So many neighborhoods full of stories and friendships and people who took care of each other, now becoming part of this massive verticalization, speculation and isolation. Neighbors have to leave due to construction companies' harassment. The ones that decide to stay have to live without their friends around, in neighborhoods that grow more dangerous, with worse traffic, with less small businesses and without knowing who are their new neighbors (which aren't even long term living). Their houses look exactly like Carl Fredricksen's house from Pixar's Up.
When it comes to digital communities, I can only be reminded of how Orkut and MSN defined lots of adolescences in Latin America. Orkut literally had the concept of communities, where people gathered around similar interests (just as the early web's forums). I made a lot of friends in Orkut and MSN Messenger, some of them are still my friends after more than a decade. Facebook tried to recreate the idea of communities (with their groups), but Facebook is pretty much dead for younger people. And Instagram is just so isolating. It has a whole lot of standardized and algorithmically curated content that alienates you from other human beings.
I believe the reason why Orkut (owned by Google) was killed was that they wanted more users, maybe to compete with Facebook. But Orkut was too localized, it basically talked to Brazil and some other countries in Latin America, and India, where it was created. After killing Orkut, Google invested a lot on Google+ (do you remember that fiasco??).