I’d argue that Toyota knows how and does make a SUV with that kind of mileage target. It’s called the Land Cruiser, but at least in the US, people don’t want to pay the price that it takes to get a vehicle built for that kind of duty cycle.
I agree the LC is over-engineered, but I also think its hyped up a bit. The whole "25 year service-life" spawned from some Toyota engineer giving an off-the-cuff comment to a reporter some 15-20 years ago about how Toyota would like to see the LC's last that long. There is no official "25 year" or "500k mile" rating in any of the Toyota literature (at least for North America). But with the right owner, the right maintenance, and living in the right climate, I definitely acknowledge that LC's and other Toyota 4x4's can last that long, maybe longer.
I guess you could argue the same for Ford with their commercial class super duties, but again it’s really about the price target people want to pay in the non commercial retail market. Value engineering at its finest.
The Super Duties and HD pickup's are the only North American 4x4's, IMHO of course, that are engineered with the same mentality for longevity and durability as that of Toyota's trucks. The F-150, while it's a great truck, very much strikes me as "value engineering." A Ford rep even admitted that the F-150's were designed with a 10 year service life in mind on a 4x4 podcast.
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