As the daughter of a UAL retiree ( 50 years seniority now) and wife of a pilot, I had never heard the term SLF until joining Pprune. When i first saw it I thought hmm is that all we are? Then I wondered when this name was applied to PAX. I compared flying years ago to now and the name surely fits. PAX are trying to fit everything but the kitchen sink into carry on bags for convenience. This has been going on long before airlines started charging for 1st or 2nd bags. Now you see PAX bringing on 3 carry ons if they can get away with it and often do. Now we also bring on our own food, entertainment ( dvd players). Yep, we're definitely carrying on our own freight LOL. As for me though, i prefer the term PP. Paycheck Provider. Ohhh the old days of filet mignon dinners, real silverware and salt and pepper shakers. As my Dad says.. DAMN DE- REGULATION