I agree with your comment, there are lots of folks making real progress in this space and there are secondary industries that benefit from things like lidar which has gotten way better in large part to this work. Playing devils advocate though - Theranos had 800 employees at its peak, it's hard to think that at least a few of those people working there genuinely thought they were trying to solve the problem.
Standard commercial unit, no clue. It happens as you say, with sun shining directly in front, especially when passing under bridges or when another vehicle passes the sun (but not in your lane). The stark difference of direct sunlight and long shadows triggers it the most.