LCDs around the gauge cluster seem to encourage the display of extraneous information and eye candy, from making what should be a simple gauge extra gaudy and shiny, to adding useless images and readings all around (look at these leaves! Your car is so efficient!).
My friend had an old Saab with the "Black Panel" button, which turned off all internal lights save the speedometer. If other readings became relevant (e.g., running low on gas), that gauge or light would illuminate. I drove a Peugeot 208 a few years ago with a similar function. I wish I could find a vehicle with something similar, but design is clearly moving in the opposite direction.
My friend had an old Saab with the "Black Panel" button, which turned off all internal lights save the speedometer. If other readings became relevant (e.g., running low on gas), that gauge or light would illuminate. I drove a Peugeot 208 a few years ago with a similar function. I wish I could find a vehicle with something similar, but design is clearly moving in the opposite direction.