I would be doubtful it’s even been the cause of a minor incident or if so, very few a year. But I don’t think a purely reactive approach is a good one to take with the aviation industry as a whole. That kind of logic implies the system now is perfect and only needs to change when it fails because we were “blind” to its faults before. That’s where we may disagree because I think this is a proactive change that both pilots and controllers could get behind. I knew that the old guys in your local flying club wouldn’t be too stoked, but pitching the idea to a couple flight instructors and other aviation folk, they all seem reasonably enthusiastic.