I should add, to the above reply, that functional to me means carrying 4 adults plus food plus gear plus water on logging roads or jeep trails, with reliability and with range. Having an extra 1,000 lbs or so of body, furniture and accessories kind of cuts into that range part, and I don't need the extras anyway. Obviously if I was looking at pure rock-crawling I might think differently, but then again I'd probably think CJ or vintage Bronco.