Originally Posted by
Flying for Fun
And that is why the poster said "a section of!"
Of course, that would assume every passenger had the same amount of carry-on, similarly sized and that all overhead bins were created equal from a volume perspective. The bin'ettes for A seats in F on the E175 may hold a few dozen beignets but a stanard acceptably sized roller-bag is dead at the door. Heaven forbid one passenger's carry-on encroaches into another passenger's section. There is a reason it has never been implemented; it is simply impractical.
It isn't just that it is impractical; it's the wrong way to apportion the resource. Some people (I am one of them!) almost never use the overhead space, so it would be inefficient to assign spaces unless the boundaries between them were merely lines. In my experience, it has been exceptionally rare in the last ten years to be on a flight where bin space was not at a premium. So if the space was subdivided somewhat equitably, it seems clear there would not be enough for most people who wanted to stow a bag and too much for those who do not. This isn't like a swimming pool with a separate shoe locker--everyone must stow a pair of shoes, thats a place where having a designated space for each person makes sense.