Dick, for God’s sake.
I suffered through your AMATS changes back in the 90’s and a perfectly good system got stuffed.
The premise of see and avoid in high performance aeroplanes is a nice idea but flawed. Small aeroplanes particularly are difficult to see from bigger aeroplanes, large multi crew aeroplanes are not easy aeroplanes to see out of with lots of metal that hide things outside the aircraft.
I don’t have an answer, but the big sky “wouldn’t hit in a fit” theory doesn’t work