True, and rear window glare can be about the worst. Sometimes large glass buildings are awful but not much to do about that but squint!
I’ll have to consult my personal way back machine, but there is some place where there is a curved glass and steel building where the Sun, at some positions in the sky, creates a focal zone on the ground that, while not hot enough to start anything on fire, elevates the air temperature up close to 200 degrees. Again, I’ll have to look it up cuz it’s been awhile, but an architectural oversight like that pretty much dwarfs anything I’ve encountered on the road.
Here’s video referencing the problem buildings. The one in Las Vegas mentioned later in the video is the one I’d heard of originally. This other one in London is similarly brutal. Or was.
Enjoy.