While the modern non-grid is "made for cars", most examples I've seen is also really inefficient at working for cars, in that most non-grid areas I've seen also

While the modern non-grid is "made for cars", most examples I've seen is also really inefficient at working for cars, in that most non-grid areas I've seen also suck at moving traffic. Inefficient intersections, poorly designed directional conflicts, etc. all exist heavily in a non-grid area, and the response is typically larger, even more inefficient intersections and more poorly designed directional conflicts. Sometimes the lack of space that a grid typically causes actually brings better traffic engineering. But it's definitely correct that the modern non-grid is definitely not suitable to walking/biking, but that's more due to zoning and centralization of systems (e.g. schools) rather than grid vs. non-grid. It's not like a cul-de-sac for a car couldn't contain an off-shoot to a pedestrian/biking path that cuts a trip significantly for a non-car.