This strikes a chord for me.
Several years ago my wife and I baked holiday cookies, wrapped them up into clear gift bags with a bow, and went door to door at our townhome/condo complex knocking attempting to spread some holiday cheer.
We had 5 doors closed on us before we gave up.
The immigrant family next door invited us in for a chat, everyone else peaked through a cracked door and waved no thanks.
My mother knew the names of everyone on her block. But it was a different time, people moved into a house, stayed there, raised a family, their kids grew up, and came back to visit their parents. As a kid I went over to the house of the same neighbor my mother visited as a kid.
Now days? Everyone moves. A lot. Chasing jobs, dreams, hopes, and aspirations. We aren't in one place long enough to form a sense of being or community.
I'm actually tackling this with my startup (linked in profile), I'm personally sick and tired of wandering the streets of my city, not knowing the people I pass by.
It does get lonely. The big tech cities are worse to some extent. I'm in Seattle, widely considered to be one of the hardest to meet people in cities in the country. In the dozen years since I've graduated college, I have made 4 solid friends (3 moved away). Something needs to change, we can't all survive being left adrift through life.