I remember one day I took my car to the mechanic and saw they were doing a head job on a Toyota Sienna (the minivan) that was used as a Taxi. Took a peek inside and realized the car had something like 450k miles.
Now a proud 4Runner owner, I see on forums all the time guys bragging about hitting 300k, 400k and as high as 600k in their 4Runners.
Well, as you yourself saw, they still need maintenance and repairs. And the “traditional” larger Toyota engines are gone. Because their fuel economy was always terrible. 600k miles in a 4Runner at 60-75 cents a mile in fuel doesn’t sit too well with people when it costs 35 cents a mile in a Hyundai. That pays for a lot of repairs!
The 4Runner of last year was the last traditional uncomplicated V6. The Lexus GX of two years ago was the last traditional V8. Aside from their small 4-cylinders, it’s all super-complicated turbos and we don’t know if those will hold up as well. Early indications are that they aren’t quite as special compared to everyone else’s super-complicated turbos.