From my experience driving in freezing conditions, more drivers are just removing about a quarter of their windscreens. Just looks like a porthole. Or when it snows, not brushing off the snow from roof
People need to leave at least 5 minutes earlier to scrape all the ice and snow off, wait until the inside of windscreen is defogged. Then drive off.
Remember driving in 8 inches of snow and so many drivers didn’t brush off the snow from roofs. They stopped at traffic lights and the braking caused the snow fall onto the windscreen. This needs to be removed manually as you can cause damage to the wiper motor.