Saw a new XD at the local dealer today so I stopped in to look at it. I mentioned to the salesperson that i had a 2012 but couldn't see myself in the new XD or the gas version based on looks alone. He said that seems to be the consensus and that he's been hearing rumblings of a completely revamped Titan by mid 2019. Says the designer is being shown the door and they're bringing in someone new. Did say they thought they'd sell a lot more based on the Cummins brand but it hasn't panned out. They will continue with the Cummins though just basically a new outside appearance but nothing major internally.