I know that B 727 has a longer range as well as larger capacity than the B 717. And I also understand that Boeing developed the B 757 as a replacement of the B 727.
Boeing launched the B 717 in late 1998 (Correct me if I am wrong)
My point of view is that the B 727 is a very reliable plane. So as the B 757. Boeing should have introduced an NG version of B 727 instead of launching the B 717.
What do you guys think?