I'm much more impressed by his progress in the game than his number of goals, because in important matches like a Champions League quarter-final or semi-final, a Cup final or a match against Liverpool or Arsenal, it's this progress that will make the difference.
He's made so much progress in the air, in his movements and appeals in set attacks, in his bodywork, his passing and his play without the ball. He'll never be the greatest player in history, because nobody will ever be better than Messi, but he has all the weapons needed to become the best striker in history. Time will tell