In the picture from the post about the discontinuation of 32 bit systems, I can't tell if that's using the lightbars Agent_Y found in the game files. Picture from Agent_Y --- Post updated --- If you zoom into the grille, it kinda looks like there might be some flashers on it, can't tell.
I believe this also has to do with the lights turning on and some parts getting the same effect as in your picture (especially at night). This effect only happens on Orbit cam, doesn't happen on Cinematic cam.
No, it's simply about sorting out what transparent texture need to appear on top of the other. It's a common problem.
That only adds smudges to the windshield & lights on the cars (you can see it best on D-Series' windshield), doesn't make them dirty overall
I mean, how is this an update speculation? I could say this is updates related cause of new members but not speculations at all