@Trudy Pachon
"What are the alternatives? Affordable housing? Some type of system that allows folks to live in their neighborhoods even when prices go up? It has to be a collective decision that we say, "Hey, people need a place to live where they have family, jobs and roots. . . . ."
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Let me play devil's advocate here: Why should we value -- to the extent of preventing gentrification -- living where one has family, jobs, and roots? Where, also do we draw the line? The family just moving in has the same rights as the family that has lived here for 40 years? No? Why not? Children grow up and move away. Why can't families move? Make new roots in new places.
To improve a neighborhood is to make it more desirable. Rents go up. If you want to subsidize people (and not force landlords to bear all the burden via rent control) then you want the government to say "[t]his person's family, jobs, and roots is worth subsidizing, but that person's family, jobs, roots, is not worth subsidizing."
Or you can build public/affordable housing.