Doubt LCD display

I have a Gameboy from 34 years ago that works the same as it did on day 1.

I also have an LCD from 2023 that no longer works.

The question is too broad to answer accurately because it depends on the specific part and what the MTBF is.
 
Do you have a source for this revalation? Polaroid material survives for decades in sunglasses, I've never seen a polarizing filter fail in a display.
This heat effect is called Nematic-to-Isotropic Transition, according to my research on the web. There is also mention of "LCD rot". My personal experience is I dropped an LCD thermometer in the washing machine, and the LCD perimeter got rotten. I think the polaroid sunglasses have the polarizing layer only, the LCD have the liquid electrosensitive polarization twisting layer between thin glasses, plus the plastic polarizing layer. If the twisting of the two is 90° apart, it is blocking light. The liquid in the LCD is some organic material, naturally heat sensitive. The moisture can leak in at the edges.