We're all wise in retrospect
"But in all seriousness, something like this should have been reviewed long ago."
It seems like it was a small piece of code tucked away minding its own business. If I understand correctly you'd mostly notice it if you had an AMD laptop and there are few of those.
So given this is of of those issues for "need for speed" types the client group is not them and probably tiny. So no-one noticed.
But finally someone did and I envisage that still no-one will notice.