Graham laid the foundations without which I doubt Wenger would have achieved what he has. For example, Wenger inherited the back 5, so his lack of defensive coaching ability didn't affect us. However, now that Wenger himself has had to construct a defence, we've seen the consequences.
One consequence of Wenger's inability to create a defence was that disastrous Arsenal squad of 2003/04. They were hopeless, despite having two leftovers from the Graham era.
While all answers are responses, not all responses are answers.