There isn't anyone on here that actually believes that these trucks can go that far without deletes or high maintenance.
I dont think any of the new emissions equipped vehicles can. I pushed an 08 dmax to 189k but the maintenance costs were ridiculous. My 12 made it to 120ish and I had to trade it in because I had spent a couple thousand dollars each previous month just to keep it running. Then the turbo crapped out and the hpfp was setting codes or having codes set on its behalf.
Had it been deleted, I bet it would have ran up to 175k just as the lbz did with only front suspension issues. Not any engine/drivetrain issues.
My exposure to the 6.4 is soooo limited I can only comment on what I know. My dads shop got rid of its 7.3 fleet because they were getting older. They got 6.4s and as work trucks they didnt delete or tune them and they had plenty of issues. Replacjng dpfs, radiators, the one truck would cook the paint off the box side during regens, and the fuel mileage was so bad they got rid of them.