I have E fence around my new orchard based on the Gallagher recommendation of one outer wire fence and 2 wire inner fence. We added a 3rd inner wire higher up and will add a 2nd outer wire before winter. I plan to disconnect the bottom wires when we start to get snow cover. I have noticed a few nibbles but no big damage. I will add some individual protection for the winter, a tube or small cage on my young grafts and a mesh tube over the central leader of the bigger trees. Those would come off next spring.
I am generally pleased. It is easier to inspect and work on the trees without caging. I did freak out when I first saw evidence of browsing. If I had to do it over, I'm not sure if I would do the E fence or cage everything.