Since WR double posted his piece #163
AA 106 @ JFK (13 Jan 23) identical in the AUS thread, my reply there:
This last one turned out as a non-accident due to pure coincidence. And the incident happened without really breaching much if anything at all.
Chiefttp IMO what stopped that accident from unfolding was one crew's cognitive performance exercised well in an area they were not supposed to be visiting as per their job requirement or training. Thus not a layer nor backup.
As an example from a computer chair, my first gut reaction was I may had taken a self-authorized break left 90 deg, staying at 2000', and not attempt to control the other plane to safety. The G/A is a layer and this time it did not resolve the situation satisfactorily.