They've been slowly replacing the flip-disc displays on the buses where I live with LEDs and LCD panels which has been such a shame. There is a beautiful mechanical satisfaction to a panel of flip-discs inverting and I genuinely find them easier to read.
Yes, even the ones that have an LED behind each disk which are on in the dark. This display [1] is the same but in the dark [2] you see the LEDs instead.
[2] https://www.urban-transport-magazine.com/wp-content/uploads/...
[1] https://cdn.unitycms.io/images/2padXosoqh99o13dcrN3co.jpg
The LED / LCD displays are probably lighter (less heavy), and someone figured they can save 0.001 gallons of diesel a year fleet wide if they replace displays.
Net Zero Fatigue is real.
They seemed less reliable than LEDs. When they were common here they would always have tens of dots stuck in the wrong position.