Do you even shoot FF? APS-C in NOT the lousy equivalent to FF. Go ahead and try super tele on FF. You'll see just how lousy it really is to shoot FF compared to a good old 7D!
I didnt say APS-C is lousy. I just prefer fullframe, even i only got an analog FF eos. But im also not using tele lenses often. Mostly im shooting around in the "portrait range"
Imho APS-C just exists cuz its cheaper to produce for now. If digital or analog medium format would be cheaper to get i would also go for it. So for me i just got APS-C cuz FF at the moment is too expensive for me. Besides the crop factor for tele lenses (if u need it) or the price, whats the advantage?