That is just plain dangerous. There have been times that I needed the defroster, couldn't safely stop, and had to keep looking out of my rapidly-fogging window.

That is just plain dangerous. There have been times that I needed the defroster, couldn't safely stop, and had to keep looking out of my rapidly-fogging window. This probably doesn't happen where Tesla's engineering is located. The typical conditions are probably 100% humidity, then suddenly getting cold rain on the windshield.