Oak Hill has planted thousands upon thousands of trees since its original architect was there. In addition, it has severely changed/altered/created the 5th, 6th, 15th and 18th holes for the sake of major championship tournaments.
Virtually no club has hosted as many major events as Baltusrol. Yes, they too have planted trees but they have never been anywhere CLOSE to having a tree problem. Importantly, in recent years, they have reversed engines on their trees as well. Yes, Baltusrol has also modified several of its holes but in the case of the 7th, I like it as is. I don't know what was there previously but unlike with the modern 5th and 18th at Oak Hill, I doubt it could have been any better.
Decade in, decade out, Baltusrol hasn't succumbed to radical changes in order to stage important events. They are almost unique in this regard. Also, they are very mindful of their history and of the privilege and responsibility of having two special AWT courses. And for this, I am thankful.
Cheers,