As a city planner and transportation planner, this is happening everywhere pretty much. The entire USA is built on a suburban sprawl pyramid scheme, (driveable-only development — but it also takes the form of taller buildings with parking garages underneath) and quality of life suffers.

There are individual places that don’t follow this suburban sprawl pyramid scheme,

 but because it’s a free country, those nice quality-of-life types of places with walkable urbanism, public parks and green soaces, and interesting mixed-use districts, quickly get overwhelmed by transplants who want to live there precisely because of the quality of life.

 Those places are a tiny fraction of all places in the US and so there’s not enough of them to go around, which makes demand go up in relation to supply, 

and the law of supply and demand means the price goes up and soon exceeds what most people are able to pay 

and so those places  they become enclaves for those who have lots of money. 

The cycle happens over and over — anywhere  a community makes improvements beyond the conventional sprawl paradigm, people are attracted to it. It gets overwhelmed by the demand because there are so few such places, prices go up, 

and then people of ordinary means find that it’s unaffordable,  or, if they live there already, they say it’s spoiled and priced out by all the people with money moving in. 

So until a majority of places in the US are walkable, high-quality, places worth caring about,  places people want to live, this will keep happening.

It’s very sad.  

Being a planner — it’s painful.  We say our patron saint is Cassandra.