Finally, a rational voice in the internet wilderness.
Statistically, midair collisions in non-contest situations are so small, especially as compared to approach to landing and scratching for lift stall/spins that the attention and money being directed to this technology is crazy. To my knowledge, the leading cause of pilot deaths is stall/spins in the landing phase of flight. The recent situation at SFO is different?

THAT IS WHERE THE MONEY AND EFFORT SHOULD GO.

Flame me.

Guy Acheson "DDS"