I think the suburban angle does matter because the general life cycle of a suburb is that they start rich because they have 0 maintenance costs, but after 20-30 years require money to pay for road + sewer + water maintenance.

So they start with a massive budget surplus which creates well-funded schools that attract rich people. But after 30 years, they cannibalize education to fix potholes. And the socio-economic landscape changes to reflect this.

We're starting to hit a lot of suburbs in the USA around that 30 year mark, and they're attracting progressively lower income residents for whom transportation costs become an increasingly important factor in their home buying decisions.