Good points. A few years ago, I visited a friend in Estonia, and even though he was in Tartu proper, they still drove almost everywhere. Essentials were only available by car.

Trains are an interesting subject. For them to be useful, you would need to have rails covering the same destinations and paths as the highway system. One should also be aware of network effects when adding another layer of transportation services, including how they affect the distribution of services and residences. From experience, we know that roadways encourage spread because they allow you to cover a greater area with little time cost. Rail will likely encourage denser development and a higher cost of living due to a greater influence of rent-seeking entities.

One of the tensions one would need to explore is the tension between the need/desire of a chunk of the population to keep their distance, keep their living space separate from others, and be acoustically and physically isolated from them, while still needing services a 30-minute drive away.