But you have two factors.
1) Price of display.
2) Need for maximum intensity constantly.

At night, you don't want to be blinded by that thermometer, so it would - in all practical cases - be basically "off".

And most probably, it would not need the maximum intensity possible with OLED displays even during daytime, because your goal would be way different from a TV monitor.

The different needs, is also why the world have managed to use CCF backlight for lots of LCD panels, even if the CCF can't really handle so many hours at high intensity.

VFD quite quickly lose intensity.

EL displays lose intensity.

Depending on type of LED, you have to keep a close eye on their intensity curves too. It's just that few LED panels are expected to do full-color and color-corrected, while lots of OLED panels are discussed for viewing photos and movies where the exact color is vital.

In the end, most display technologies contains sub-groups with huge difference in capabilities, depending on intended use and size of wallet.