Exactly the point, it should be a standardized, computer driven evaluation and yet again is a perfect candidate for an ML training project. It turns a very complex evaluation into a score and a standardized service directive. (This would supplement and not replace the real time evaluation of the image quality by the FSD driving NN, which is still needed to feed back to the Mothership, and to flag the need for a service visit.)
I was thinking of the front cameras in particular, but the service tool idea could be extended to the other cameras as well. Now that we can see the pillar camera image in the live camera view on the app, I noticed even here in Southern Arizona that it's prone to internal condensation and image degradation.
Hazing or just dirt on the glass lights up best when the incident light is oblique. It would be an interesting project too develop the LED array, and maybe there should be some associated tubes or optics to provide a variety of angles. Come to think of it, maybe the whole thing could be a single strong light source with a molded optical distribution pattern, a customized variant using the design methods of edge-lit LED panels to get the specialized pattern and angles. (my mind always drifts to the design engineering problem
)
Mine is a very late 2021 Y, and was exhibiting serious degradation by 18 months, notably parked outside in the daily sun.
The camera housing seems to have spray flocking, not just flat black paint on the inner cover. That is some kind of glue mixture and it probably has a stronger chemical off-gassing signature than even the normal automotive interior plastics- which we know are prone to deposit haze over time. I have no idea how the newer cars differ in this respect, but new suppliers and different materials could easily mean that the older cars suffer less less from this problem.
It's a good idea, maybe even add the camera scores to the tire pressure readout on the screen and on the app. Because it's a new system health status that owners don't traditionally look for it, and that would gently educate and remind them to be aware of it.
As you found with the Tesla techs themselves, people don't think about this and are if anything skeptical when they first hear about it. But when you look at the dash cam images from a hazed camera, at sunset or at night, it's pretty shocking.