Just wanted to share a dangerous encounter with new v8 feature. I upgraded to 8.0 about a week before going on a 2600 mile trip. While driving at night, in humid conditions I started to get condensation on the outside of the windshield. Wipers would take if off but I figured I could just heat up the glass to reduce the need for wipers to keep wiping, so I turned on the front windshield defroster (tap twice so the icon turned red) - within a fairly short time my windshield was fully covered by condensation and wipers now smudge it rather than wipe it. So here I am, driving 55mph through a winding rural highway, with almost no front visibility and a big rig bearing down on me from being. It turns out in v8 red HI defrost now means high AC, not high temp as it used to. Either some genius PM driving in dry California weather decided HI defrost works best with max AC, or Tesla is not QA'ing basic functionality, potentially causing dangerous driving situations. What's next, the little triangle for hazard light will change functionality to drag race launch mode? WTF Tesla? Can we at least get an option to never upgrade so I can avoid such "improvements" that could kill me?