Had BOTH the aircraft in this tragic incident had FLARM and PCAS, I suggest it is most unlikely it would have happened.
Rod
If you read my previos threads I am all for Flarm and PCAS as a solution.
I note in your section pasted above you post this
Had BOTH the aircraft
Would you be in favour of getting a system worked out and then compulsory fitting of the above. If that is the case then this would be a workable solution and I would be happy to persuade my owners to fit the kit in their aircraft on top of Transponders and TICAS.
But if its not unilateral or at least nearly a majority use we are all wasting our time.
Pace