It may be a cash cow, but that doesn't mean it's impact to the pbig picture means squat. If they can reconfigure a line to run more efficiantly, and intrduce another lower profit, higher volume vehicle, it make absolute good business sense.
If you really look at the Excursion, in it's current form, it's not really the ideal passanger vehicle/people mover there is by todays standards. For my 6 year old to ride in it, she has to be in certain seats or sit in a booster so she has both head support and a shoulder belt. I the back seat she needs to sit only on the left side where the belt is not 2 feet above and behind her as well as a 12" gap to slide off the seat.
Don't get me wrong, the Ex. fits our needs which is why we have one, but it's not perfect for today's market. You could say it's a little rough but for the volume, it doesn't make sense to improve and modify it, even if sales would increase slightly.