'99 F-150 with >250k on original engine and transmission here. Going to pick up 900 lbs of rock tomorrow. Suspension is pretty poor, but it still pulls hard under load. I'd like to upgrade to a newer model, but the '99 refuses to die.
It feels heavier than that, so I looked it up and my memory was wrong, it's ~1400 lbs per scoop.
Anyway, my point is that it's been a surprisingly good vehicle that just keeps going. Throw some lumber on the rack after loading gravel, it doesn't care until the suspension starts bottoming out. It's not my first truck, and I'm not tied to any brand, but the overall experience has been so solid at high mileage, that it sets a bar for any future trucks.
I'm just a single data point, and I'm sure there are folks who've had poor experiences, but having owned many vehicles over the years, the F-150 feels particularly robust to me. Honda engines give me a similar feeling. As one commenter described "using in anger", there are some things that will take repeated abuse and just love it. Maybe I've been lucky, but in my limited experience, the F-150 has a well-deserved reputation.