I'm still trying to bring myself to accept those fat tire dual chain drive jobs, powered by Briggs&Statton. All this newfangled technology is too much for me.
On a slightly more serious note, the bevel drive at the front comes across to me as a problem waiting to happen. If it's wide open, as on the prototype, I'd give it about two muddy water crossings or a day in the California dunes before it wore smooth. And if it's enclosed, there's no way to avoid having a bunch of unsprung weight in a place it's most definitely NOT wanted.