I have to chime in here, i haven't been behind the wheel of the new powerstroke, don't want to, no need i have my 2000 ctd. . Have never driven anything with the 6. 9 in it, but i did drive a armored van that had the 7. 3 international and i must admit that was a very stout engine for what we used it for just plain hauling weight, it carried 10,000lbs when empty but the engine had around 400,000. yes those are actual road miles the thing rolled over while i was driving it myself, but it kept chugging along and it didn't matter how cold she would start when the powerstrokes would not.
As for ammo, i have to agree with the less moving parts, as we all know and its a fact that Inline engines last longer and have more torgue even in a gas engine, for ex: fords 300 six cylinder that was out in the eighties i believe, i may be wrong and those also has them in the early 90's. Better fuel mileage, engine for sure is better balanced(IMO).
Cummins: tried, tested, proven, true... . Simply where diesel engines started and that basically says it all, I mean how could they be wrong with something that has been around since for 80+ years... .