> A mirror is harder to take out with a single splash of mud.

Never mind mud, what about the ice? I drove trucks for a while and the entire front of my truck was routinely coated with snow, slush, and ice. If it was heavy enough I'd have to pull over and tap at it with a 'tire thumper' to knock huge chunks off periodically. Keeping the windshield clear was a constant battle. I wonder what kind of camera or sensor could be used that wouldn't ice up. Traditional mirrors have heating and most are enclosed in a front-facing housing. They get really hard to see out of too, because the salt and sand spray kicked up by the vehicle in front of you sticks to the heated glass of the mirror and collects there. Visibility in winter driving is a difficult problem but perhaps that can be improved.