tl;dr: Nobody needs an SUV.
I'll fully admit, there are many people who LIKE SUV's, and who will continue to like them. There are many people who feel the need an SUV. But nobody needs an SUV.
SUV's fill a niche that should not exist. With either a minivan or a station wagon, the family can handle anything. I grew up with a second gen toyota tercel wagon 4wd, which my family took from east cost to west, and back(WITH at least one stroller thankyouverrymuch, and never even used the roof rack). Family grew to 3 children, and purchased a minivan. Tercel died of a broken timing belt after almost 300k miles, and moved to a corolla wagon.
So, with a minivan, you have: 7-8 seats(usually) that can be converted to 5-6 seats with a large luggage area, or 2-3 seats with a HUGE luggage area for hauling. Plus a trailer.
With a station wagon you seat 5-7(depending on model), and can remove seats to have a huge luggage area depending on needs. Plus a trailer.
The SUV is nothing but a station wagon, stretched, and put on stilts. They're the most ridiculous vehicle on the road, and i can never help but laugh when i see them. Vision is worthless(huge blind spots) that nearly push people off the road(I've had many opportunities to kick a dent into one on my motorcycle when they start changing lanes into me), primarily driven by one of the following: Single women who have self esteem issues; Soccer moms with delusions of grandeur, who spend too much time on their cell phones in the car and doing their makeup to actually drive; Single men with problems in the crotch area, and think they can compensate(although these tend to drift more towards pickup trucks); or married men with children who are 'too manly' to drive a station wagon or a minivan.