They gotta be stupidly expensive and likely very-low production vehicles. But the truth is those aren't the only reasons you likely won't see the Lamborghini Urus and or the $500,000 gold-coated and armored Dartz Aladeen Prombron in the pages of Four Wheeler.
First and foremost these vehicles likely do not have a transfer case with a low range selection (but we'll look into it). And secondly, we don't think either company would be stupid enough to let us test an unlimited-budget SUV off-road the way we do. But who knows, we've seen automotive companies do stupider things.