Out of curiosity, how many 1988 built 737s do we have flying for us right now? How about 1970s 732s?

The 88/90 was not built to be a transcon airplane, and so it's not. The 739 was not built to be comfortable, so its not. It was however built to be transcon, and yet we question if it really is.

By the way, still okay with 739 replacing a 757 or is this just anything but Airbus?