Let's talk about the East Side.
https://www.austinmonthly.com/in-photos-what-gentrification-...
I don't think many home owners got a price for their land that allowed them to buy a similar house elsewhere.
The world is far from an ideal model where what you get is what you deserve.
Note the history of the East Side power plant, which depressed property prices. Ditto, I-35 construction plans. The article says the plant will become a park now. After the new developers locked in purchases.
You see this business model everywhere. They buy up all the land around an industrial site, small airport, race track, pig farm that smells bad, etc, etc. Then they and their Karens lobby for rule changes that force that use out or make it non-competitive in the broader market. Then they develop the land.
Nothing will fix it until some case goes up to the supreme court and results in some sort of "they were there first the .gov can piss off" doctrine.