I agree, watching linares move is just magical. It's something definitely earned through hard work but at the same time at the level of linares and gamboa I truly believe it is a God given gift they have where they just have superior balance and spatial awareness, heightened senses above us all.
I only say this because I have 4 children and watching the differences in them all is amazing. I have my second son who is like a cat. Throw him up in the air and he'll always land on his feet, amazing poise balance and athleticism and then seeing his siblings try to imitate him just proves to me there is something different about the way he is wired.
Still I do believe hard work helps a lot at grinding away motor patterns.
I do notice though that the earlier years boxers did have much more 'beautiful' footwork.