The 321 is no competition for the 757, the two planes serve completely diffeerent tasks. The 321 and 739 are both niche airplanes, and consequently, only sell in limited numbers.
I, too, questioned Boeing's decision to cut the 757. BUT, orders weren't there, so I guess it was time to stop while they are ahead.
Considering the 757 is the most economical single-aisle airplane in the sky, it seems odd that orders dried up in the first place. Oh well. Let's hope the 7E7 turns out to be even more magnificent than the 757 is.
You know, as I look backward and forward, I see all of the soft spots we have for the 757 (as airplane nerds, we DO
have softspots) but also the softspots we will develop for the revolutionary 7E7. There's a real sense of pride to be had with both- both are revolutionary machines. The 757 pioneered things like FADEC, EFIS, and other systems that are standard on all airliners today. The 7E7 will pioneer airliner-scale composite technology, bleedless engines (I am still a doubter on that one), bigger lavatories, big windows. And other great stuff.
Here's to looking forward.