This brings us back to an argument/distinction that has been covered many times here, namely separating the hole in question from the other things that go along with it. Scenery, tradition, etc. factored in, or factored out?
I can't imagine a greater feeling than walking up the 18th at St. Andrews; all of us, at least the first time, probably felt as if we could see the galleries and hear the cheers. In that respect, it is a great, great hole in the golf world. It is hallowed ground.
That said, I'm not sure that the hole anywhere else would be notable. It lacks most of the concerns that would make it so, including things like the bunkering that makes St. Andrews so special.
THAT said, the 18th ISN'T anywhere else. It's the 18th at St. Andrews, and when you arrive there, you have finished the most unusual and special round in all of golf. It is possible that if the hole was far more demanding, the way we have come to expect 18th holes to be, that it would be all wrong, especially after the 17th. It might detract from the course; the way it is, the 18th is absolutely perfect, and has to be considered great.