Why does the 4.7 get those bad
"Above 250 degree coolant episodes" ?

Does the water pump seal go out earlier than normal,
or does the impellor corrode away if the antifreeze is not changed on schedule ?

Is another part of the cooling system plumbing prone to sudden large leaks?

Does the viscous fan clutch go bad and no longer lock up?

Some 4.7 equipped vehicles have electric fans, so does something malfunction there?

I remember early model year 4.7 V8s had " brown sludging" where crankcase air flow was not carrying away blowby gas moisture properly.