I have used my radar controlled cruise control for the last 6 years in rain, fog and every other condition available. The only times I had issue was when snow built up on it, even though I wasn't using it as that would have been silly, but I had a warning that it wasn't available due to obstruction.
The point I am trying to make is vision will never be as good as radar, due to the limitations of cameras, and the limitations that a lot of other people have mentioned in this and other threads.
I am happy the Y has scored so highly as it does look a safe car, however if they would have tested it in real world conditions, with dirty cameras, or rain, or fog, then things would have more than likely been different, and that is my point.
It does look like Tesla is making some decisions lately that are retrograde and point to cost cutting, which is a shame and it won't be long before other manufacturers notice and start highlighting this to make comparisons. Then again, if I had to find £44 billion to buy Twitter then I would be looking at maximising my profit margins too.