The issue I have with the likes of TCAS (and TAS and CADS along with all the rest) are that in times of war these will be turned off, all the lessons we learn and all the reliance we place on them in peace time will be lost in war. This will place a massive learning curve on today’s pilots at a time when they should have already learnt the lessons of SA building (ie day one of a conflict is not the place to learn simple lessons like this).
Too many commanders are thinking of solutions to save their skin now rather than seeking something that will work in both an operational theatre, where aircraft are manoeuvring aggressively, and the Friendly skies of the UK which are filled with civvies.