Someone competent today may not be very competent after a few months of doing only boring AI code reviews. That, or the reviews may degrade to rubber-stamping due to their tediousness.
With the exception of a few models of the E series, Thinkpads cannot be bought without Windows where I live.
In this situation, the certification has no value to me. I ain't giving money to Microsoft, no matter whether I am going to use their sorry excuse for an OS or not.