Houses and cars are WAY different.... cars loose money where as houses gain money.
Prime example, purchased a new Saturn in 2002. Wife drove it for nearly 3 years. Still owed money on it. Low milage, factory warrenty for 2 more years...great condition. Tried to sell it and got nothing, ended up trading it in to break even. Where did I win? I didn't. It would have been the same thing if I would have leased it. I had it for 3 years and less than 36K milage.
Selling used vechicles sucks.... its just a pain the arse. Everybody wants to low ball you ad not pay what the thing is worth. I hate it. Plus this way, I get a new car every 2-3 years, never have that bad time when you are still paying on a car and it doesn't have a warrenty. Never have to buy tires, or do anything major out of pocket. Plus that way, if you end up not liking the car you don't have to put up with it for too long.
Plus, I figure if i keep buying cars, it supports the rest of the economy. Especially in Michigan! it suports the auto suppliers, the truck drivers that haul the car and all the parts to the factory, the auto workers keep their jobs and spend their money EVERYWHERE else and so on...