I think that modern society has lost out by not adopting the old type of building: those with courtyards. It wasn’t for nothing that ancient cultures often used buildings with central patios. The patio would be an ideal place to schmooze with your neighbors, share gadgets and appliances, and watch out for one another. Of course, you would need to share basic core values with the others. I could imagine a family with several married siblings living in such a place. Sisters in-law could take turns watching the toddlers in the afternoon, giving the other women a break. Grandma could easily keep up with her grandkids; she could be more involved. This would give her greater self esteem. And if an elderly parent was needing help, it would be easier to all to pitch in.
The only drawback I see is the need to avoid lashon hara (evil talk, gossip) and fights. But we need to do that in families, anyway.
But instead we all live in flung out places, and need to travel just to visit our families. And this leads to families being deprived of the most natural support group around. We live in homes carefully separated from neighbors. Even apartment dwellers often don’t know their neighbors in some societies. (In Israel, they generally do….) It seems to me a very lonely way to live.