If you channel them to be somewhat more linear, commuter rail can work okay for suburbs. Copenhagen took that approach, with a goal that even quite far out subu

If you channel them to be somewhat more linear, commuter rail can work okay for suburbs. Copenhagen took that approach, with a goal that even quite far out suburbs should be in reasonable biking or bus distance to an S-train station: https://en.wikipedia.org/wiki/Finger_Plan https://en.wikipedia.org/wiki/Finger_Plan