Hardly an old thing. My 2017 model supports that just fine, and it's not just a button but a circular slider that goes all the way down to the dash lights being practically off.
I had a 97 Saab 900 turbo with an “airplane mode” button that turned off all the dash lights except for the speedometer. It was actually pretty damn useful.
With all the screens in midern cars, even the minimum brightness is too bright for me driving in the night.it wont let your eyes adapt to the dark.
My last Hyundai had a moon button to turn off screen but that was an exception ithink.
I have driven hours with a cloth over the screen of my skoda octavia in the night.
Please let me turn off the screen for dark night driving, thank you.