Originally Posted by brunos

Indeed, CX has been using a 4-class 77W on quite a few destinations but not offering F (some lucky J pax have been seated in a F seat).

WHat is discussed in this thread is F comeback, meaning the reintroduction of F service on a few destinations:
As far as I can see, CX has only reintroduced F on one LHR flight and soon CDG. None to USA for the coming two months.