Because J doesn't exist. I've mentioned this in every post and no one has said a word about it. I get a strong feeling its not a concern.
8driver, I am HKG based not on the -400/-800, so I don't suffer the freighter PX or Y class PT, but I am not unaware of it, and I think it is a disgusting cop-out by the company. The Y vs F ticket issue is typical HK (and especially CX) mentality to just read the words, without understanding their meaning.
I agree with jacobus that watching paint dry is excruciating, but I believe it is the way ahead here.
The "explanation/way ahead options" attached to the letter from GMA are obviously intended to intimidate people in your demographic to sign. Your 8 years at CX has probably taught you to question why they are trying to push you & your demographic into signing. The usual answer to that question is that it is in their best interest, not yours.