“This, then, is the knot for Liverpool and Manchester City to unpick. Convention says one thing; science might indicate another. Some of that might apply to Salah and De Bruyne, or all of it, or none of it. They are both at the peak of their financial powers; they are likely both past the peak of their physical ones. Quite how far down that particular slope both have travelled is possible to estimate, but not to know for sure”
https://www.nytimes.com/athletic/5955088/2024/11/29/salah-de-bruyne-new-contract/