I am not familiar with the details of LED lifespan, but a “white LED” in particular is not just an LED; it is a blue LED coated with down-converting phosphors to create a white color mix. Those phosphors have significantly shorter life, as noted in the article.
Also, any physical object will decay over time, so I’m not sure how good an example of a thing-which-can-change-state-but-has-no-memory can exist.
The amount of light a LED emits for a given electric current decreases and changes color as a function of how much time it has been under activation in its whole life.
I am not familiar with the details of LED lifespan, but a “white LED” in particular is not just an LED; it is a blue LED coated with down-converting phosphors to create a white color mix. Those phosphors have significantly shorter life, as noted in the article.
Also, any physical object will decay over time, so I’m not sure how good an example of a thing-which-can-change-state-but-has-no-memory can exist.