Birney cars began to fall from favor in part because of the features that had originally made them attractive. Their light weight could be a problem in snow that a heavier car could easily plow through. Their short length made their ride quality comparatively poor, and on poorly maintained track they derailed easily. The public began to deride them as flimsy. Their limited passenger capacity rendered them unsuitable for busy routes and rush hour service, causing them to be relegated to minor lines or to be sold mostly to small-town streetcar systems.