The ex-AF lounge only became available for CX to use because AF moved from TBIT to T5 (to be with DL, its Skyteam partner who has very nice customs facilities at T5). CX did not use the AF lounge while AF was operating out of TBIT. It's possible that CX has lost the use of the lounge now, or it may be closed temporarily, but it has nothing to do with AF leaving TBIT. I've managed to avoid flying CX via LAX for all of this year, but the SFO lounge is no better and the JFK lounge (BA) while being much better than TBIT is worse than LHR for example. Haven't seen the new YVR lounge, that is supposed to be quite nice, so maybe those who want the lounge experience need to go via YVR. I've been trying to reduce my lounge time this year, with mixed success.