I still miss my '96 F250, 7.3 powerstroke (Int'l 444). Bought it with 58,000 km on it, retired it when it had 720 000km on it (my wife told me it wouldn't fit a baby seat). The transmission casing cracked from heat fatigue at around 600,000 km. Diligent on maintenance and high quality fluids (chevron primarily). For the engine, only ever did glow plugs. Weird solenoid issue at the beginning (swapped Ford parts for Int'l) and had to deal with poor fuel bowl aluminum castings twice.
My 2011 f250 diesel was a pain for cheap turbo bearings and exhaust system sensors (the crap VW cheated on).
Still got about 60% of what I paid for it after 10 years when I got my 2024 f150 last year. Only brand new truck I've had.