I have to drive a dark, twisty back road to get to and from my work. Over the winter months it can be horrific. I often find myself completely blinded for a few moments, and I follow the recommendation to look at the left kerb until they pass. Its much, much worse than it used to be, LEDs are to blame. Some modern cars seem to be worse than others - some modern MINIs seem to be especially bad.
The other modern issue is people with auto-hold brakes not engaging the parking brake when stopped at traffic lights at night (as recommended in the highway code). So you find yourself staring into a wall of high intensity red LEDs. Once you get into the habit of flicking the parking brake switch when stopped, it becomes second nature, but I think most modern drivers don't even know how to do this...