Agreed, the TCAS discussion is off-topic, but I hope readers will permit me one last reply to nigegilb to save starting a new thread.
I'm not sure what you've heard, and you won't find people discussing specific details of theatre on an open forum, but the ATC situation is probably not as bad as you thought.
I know nothing of defence procurement but as a layman I would be surprised if we got TCAS on an aircraft that supposedly has only 5(ish) years left.