Were they bulldozed and rebuilt into car-centric development?
From my understanding Strong Towns think "lower density, less intensely urban development" towns are fine. E.g. at 0:57 of the video, it's anything but intensely urban development.
"In this example, a 100-year-old commercial block, built in the traditional style of development, drastically outperformed a shiny new development, created in the modern car-centric style."