Originally Posted by
wetrat0
Correct answer. There aren't enough bins to allocate one "bag's worth" of space per passenger. Even if there were, some overhead bins carry safety equipment, crew luggage, etc., so the idea that a "reserved" space would be next to your seat would be impossible.
OP, you should look into buying MCE. AA aircraft now have certain bins reserved for MCE. Although this is not policed by the FAs, MCE also allows you to board before regular coach, so you would have a chance to put your items in the reserved bins.
And, of course, holding a qualifying Citi or Barclays AA credit card not only affords one Boarding Group 5, but also permits a free checked bag on domestic flights. (I realize that some people prefer not to check a bag.)