Urban planners lose sleep over stroads for very good reasons but from a simulation and tooling perspective, streets still need a shared geometric backbone

I don't think that much is shared between streets and roads. Roads need all the details about curvature in the article so car traffic flows efficiently. Compare that to the beautiful but narrow streets of a Mediterranean town. Buildings are rarely parallel, angles are odd, but everything is on a human scale, and it just feels good to walk around.