I agree dense housing would help. Another idea is more group houses. It seems that there’s an excess of big houses in the US right now: https://www.wsj.com/articles/a-growing-problem-in-real-estate-too-many-too-big-houses-11553181782
More thoughts on roommates as a solution for loneliness in this post I wrote: How to Make Billions of Dollars Reducing Loneliness. (Have learned more about the topic since writing that post; can share if people are interested)
I agree dense housing would help. Another idea is more group houses. It seems that there’s an excess of big houses in the US right now: https://www.wsj.com/articles/a-growing-problem-in-real-estate-too-many-too-big-houses-11553181782
More thoughts on roommates as a solution for loneliness in this post I wrote: How to Make Billions of Dollars Reducing Loneliness. (Have learned more about the topic since writing that post; can share if people are interested)