Why is there so much variance in the carry-on baggage weight limits between airlines? Some are as low as 15 lbs. per bag, while others are as high as 50 lbs. (And most US carriers have no weight limit - only size.) And these posted limits are for all “mainline style” planes in an airline’s fleet. Does the construction (thus weight bearing capacity) of the bins also vary that much?
I can easily travel for two weeks with a 22 lb. carry-on bag and avoid checking, but I can’t imagine more than 4 days with a limit of only 15 lbs.
Policies vary on a lot of things between airlines, but this large range seems strange to me.