Me and my wife have a 2010 platinum armada with 155k on it. We've been discussing the possibility of getting either a 2019 or a 2020 edition, but I'm not sure if there's any changes that have been made from the older version to the newer, drivetrain wise? And are they as reliable. I know the exterior and interior have had some remodeling, but I'm more worried about everything else internal. We have had very few issues with our 2010 and I would be very adjusted to purchase a new one if it was just as reliable...