It is just an addition to whole topic of alerts that even if in some setups ATC doesn't have the alert or is overloaded to react in timely fashion that ATC it i

It is just an addition to whole topic of alerts that even if in some setups ATC doesn't have the alert or is overloaded to react in timely fashion that ATC it is not the only thing preventing the collision, that there are systems and procedures on the plane. Maybe I should've replied to original comments instead but yours seemed like a good place. Sorry for causing confusion.