not everyone needs a practical vehicle.
good step-in height, excellent build quality, feeling of security, good power and handling and even decently comfortable. Not sure why many are so quick to criticize owners of these vehicles - likely without actually knowing any.
Not everyone wants a Miata, Corvette, Prius or HD pickup truck.
mmret, you claim to be wearing a flame suit, but to me it seems like you're the one brandishing the flamethrower... You say you're not judging, but you're accusing anyone of buying one, with only your assumptions of their motivations, of being devoid of taste, in excess of ego, and yuppies.
If i had the money, you can bet there would be a couple of vehicles in the driveway that fit your assumptions - cars purchased because they are awesome, but with no particular justification from a reasoned observer's perspective. An X6M might just be in the running (after the 911, corvette, RR Sport, S-Class, and perhaps a couple others...)