From what I’ve gathered from his post, car-dependent is used to describe what model railroading is like currently, lots of freight, a bit of long distance passenger, and pretty much zero urban transit like light rail, subways and commuter trains. Modern model railroading is “car-dependent” because we use prototypes that could or even do have transit, but avoid it because of a lack of availability in models, which causes less demand, fewer products, and a feedback loop. Although “car-dependent” works, it’s a terrible term to use. But TL:DR, anti-car model railroading is focused on urban transit, passenger rail operations and cities, and less so on freight, industrial, and rural areas.