no way all * flight AND UA flights can operate out of one terminal.
and the train, the LH lounge, and the fact that B is a great terminal makes up for what C/D lacks.
IAD used to be my home airport, but i agree with some posters here. it fits my need, and i've given up hope for a new terminal a while ago.
besides, anything that IAD has now is way better then the dreadful G concourse. hopefully nobody has forgotten that place.