Agree . People who we know well keep arguing that PFS failed . Even if it did it is inconsequential if OS stellar . You don’t need surrogate marker if you have an actual marker . Simple as that . It’s like saying steam coming out of water on stove is surrogate marker for temp being above boiling point . But if you have reading from a thermometer immersed in that water , it doesn’t matter if you can see the steam coming out of water or not , you have the actual factual temperature .