On: JAL A359 at Tokyo collided with Coast Guard DH8C o...

[YPPH]

Assuming (1) the replacement is a better solution, and (2) it is feasible to retrofit every aircraft in the world and switch everyone over to it.

Just in relation to (2), I can't really think of anything worse than having two communication systems on operation at the one airport - everyone must be using the same system.

[konschubert → YPPH]

You can make it an incremental upgrade that adds an additional safety layer, at least until all vehicles are updated in 30 years.

[hindsightbias → konschubert]

The average age of general aviation aircraft is well over 30 years old.

[shiroiuma → hindsightbias]

Just ban older GA aircraft from most airports. Why do these things need to be tolerated?

[konschubert → hindsightbias]

Well, then let’s start