Arsenal let some promising young players depart in recent days including Lino Sousa, but the reality is that not all academy talent will make it at the club. In 2019, Bukayo Saka became a first-team player, but whilst he succeeded, fellow academy prospect Yunus Musah decided to leave. The USMNT midfielder left in the summer of 2019 to join Valencia, whom Arsenal had beaten in the Europa League semi-finals a month before. He became a success despite their struggles in La Liga, and this summer he earned a move to Serie A giants AC Milan. He is forging a good career for himself, and has now opene…