Holy smokes! I'd be almost embarrassed to show any of my 2nd year trees. Very nice growth
My Galarina planted two years ago was doing well then went lights out overnight DOA. I'm thinking juglone root poisoning from a walnut tree cut down a few years ago.
What symptoms did the tree display? Did the leaves just turn brown, curl up and the tree die? I don't know that I would blame the old walnut tree, I have had several apple trees just mysteriously die over the past couple of summers that I am sure were not caused by walnuts or fireblight. Thankfully not in my main orchard.