Cities generally want poor neigbourhoods to get developed and upgraded; if a poor neighbourhood becomes a rich neighbourhood, that's a win for the city, no matt

Cities generally want poor neigbourhoods to get developed and upgraded; if a poor neighbourhood becomes a rich neighbourhood, that's a win for the city, no matter if it's populated by the same or different inhabitants. Cities can focus and redirect development in various ways, but they are explicitly redirecting that development to the poor neighbourhoods because they don't want these neighbourhoods to stay poor.