Life is often about the little things. Undergrounds, Subways, and Metros are easier to navigate when the current status is available at a glance. One point for Paris’s Metro over London’s Underground. London has hard to read maps on passenger cars. Paris makes life easy for out of town family travel bloggers by showing status lights in positions riders can see.
Paris made sure to not spoil the Giants since the very next train did not have status lights. Part of point lost for Paris Metro.