In some ways it's similar to the tourism or gentrification problem - the very things that make a place desirable lead to the destruction of those things. Some people view the world through a purely economic lens and treat individual people as abstracted production/consumption units. And unfortunately there's no real way to put a dollar value on "all the neighbors know each other and help each other out". And even if you could - you can't just BUY your way into that, no matter how much money you have! The only way to unlock that value is to live there and engage with the community. Obviously there will be turnover but what some people don't seem to grasp is that there is a tipping point, where enough newcomers overwhelm the "old timers" and destroy the culture of a place. And think about the game theory of it from the point of view of a resident - why invest time and resources in a community if you're just going to leave in a year or two? Or if the beneficiaries are future random people who are not going to give a shit about the community?