When I transitioned from B737 to B757 & B767 I went for a walk round. I assessed where the main wheels were fore/aft and how wide they were from the centreline. I looked how far out the wingtips were. On a normal apron taxiway, how far outside the tarmac were the wingtips. I watched other wide bodies taxying and noted where the nose wheel was relative to the yellow line and where the main wheels were, especially on the corners. It gave me a feel for the size on my new a/c. I was terrified of thwacking a wing tip for off roading the mains. Then a further reassessment from the flight deck as to where the wingtips were over the ground.
In this instance the tail of A321 was well inside a visible danger zone assessed from LHS, whether you could see the wingtip or not. Had the complacency of 'follow the magenta line' been transferred to the Yellow line?