Hi ChrisI can answer your question why, in one word, for me anyway, age.
When you get older getting in and out of a car, I can assure you, is a big issue. Not bhp, not off road just getting and in and out. It comes to everyone eventually believe me. I have had an IS200, 3 x IS250, all great cars and my IS300h is amazing, but getting in and out becomes a problem to us all.
Exactly that, I had to sell my lovely CLS as my wifes illness affects her mobility, a 4x4/crossover is about the only vehicle (apart from large 7 seat MPVs) that give the ease of ingress/egress, that is our priority nowadays....along with seat and ride comfort.