Originally Posted by
cpr_metro
... no ???
Umm. No.
The overhead bin space is shared space with all passengers and is often overfull as it is. Trying to stuff in sideways a 24" suitcase, assuming you even get it onboard past the GA, is likely to really annoy those around you. There are many on this board, on finding the bins overcrowded, who would simply turn your bag so it is in end-first and use the resulting extra space to stow their own bag, leaving the bin open. When the FA comes along and is unable to close the bin, it will be the oversized bag that will be removed and checked. And you would deserve the resulting trip to baggage claim upon arrival.
We all have to share the very limited onboard space. That is why the airlines have the rules they have. The really experienced flyers who frequent this board all manage to get along with legal sized carryons. It isn't that difficult.