While this survey is done with neighbors, I wonder how it is in general. In a number of countries complete strangers great each other. Like in The Netherlands,

While this survey is done with neighbors, I wonder how it is in general. In a number of countries complete strangers great each other. Like in The Netherlands, though the likelihood to be greeted depends on where you are, time of day, and age of the people who greet. In a big city people generally don't greet strangers, unless they meet very early in the morning and the occurence of a chance greeting among early risers grows. When city dwellers enter the suburbs and esp. when going into nature, they start to greet. Smaller towns and villages see a lot of greeting in the circle that one can count as beyond neighbors. The younger people get the less they seem to participate in this old habit. Maybe they 'learn' to greet at older age, or modern society and smartphones are killing the tradition. I sometimes wonder if in modern society we are shifting more and more to a stance of distrust of the people we don't know, and this affects the greeting culture too. Overall this casual greeting, often accompanied with a warm smile and sometimes some small talk, feels uplifting and heartwarming. Good for wellbeing I would say. This is all anecdotal and YMMV, but I encourage to engage in the practice and reap the rewards.