Part of the problem is that the scale of aircraft manufacturing is small. Cessna has produced fewer 172’s since the beginning of time (the most-produced civil a

Part of the problem is that the scale of aircraft manufacturing is small. Cessna has produced fewer 172’s since the beginning of time (the most-produced civil aircraft in history) than Toyota sells Corollas in a month. So everything is expensive because of NRE. That means nobody wants to pay to add another box to the cockpit. Now you have a game of prisoner’s dilemma: unless every aircraft is equipped with the safety technologies HN is proposing, you get little benefit. Until everyone has the little box, the controller still has to say everything over the radio (so unequipped planes can hear what everyone else is doing). “So what’s in it for me if I upgrade?” So things like ADSB don’t happen until the FAA mandates that everyone spend $10k for parts and labor on cockpit upgrades and offers a new free digital weather service and a bunch of other sweeteners. And still some aircraft are exempt from the ADSB mandate.