In my opinion, there are two points that make this a bad idea. Connecting passengers whose flights are delayed or those who start early from a distant destination may well end up with nothing to eat. In my limited experience (albeit with other airlines), there are rarely enough BOB meals to feed an entire Y section. Secondly, it is difficult enough to board with passengers juggling coats, bags, etc. and now even more passengers will be balancing drinks and food as well. Sigh.