>we saw every single vendor do this
Except Apple.
Except Apple.
Issues like the Intel i9 performance going significantly downward with consistent usage are often missed by benchmarking apps: https://arstechnica.com/gadgets/2018/07/we-tested-throttling...
However given that Apple isn't the only one who licenses their designs I'd put a large sum of money on them doing the same thing.
My 3 year old Oneplus X is more responsive than my iPhone 8 (work phone).