We've had a few at work and have fotten rid of all of them except my service truck. EGR issues, turbos, cams, injectors to name a few.
My service truck lost 2 injectors at under 40k. Ford wouldn't warranty it. Claimed there were signs of moisture. Diesel fuel does have a slight bit of water, hence the reason for a water seperator. Needless to say, 8k for a new fuel system.
Personally I wouldn't buy one.
I'll keep my 15 y/o 7.3 and keep rollin