Well, you either get nice but prohibitively expensive places that also look and function like segregation tools increasing and perpetuating inequality, or you get slums that get progressively worsened simply as the time passes. Is there even a middle ground?
Like, moderately expensive areas that are medium density, so that they exacerbate the housing crisis but aren't particularly nice to live in?
I think people voted with their feet to expand geographically into the suburbs where city cores experienced the bimodal outcomes.
If the only place people would genuinely and completely freely choose to live inside a city is a place they can’t afford, but 3-30 miles away is a beautiful neighborhood of detached houses that they can afford, you don’t have to think very long to predict that there will be intense interests in these suburbs by people seeking to escape the city.