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.