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Saka will never able to reach his full potential if he still stays as Arsenal. We haev been witnessing so many players who won a lot of trophies and reached their peak after they left from there. It's started with Thiery Henry, Giroud, and recently Granit Xhaka who won bundesliga with Leverkusen.
I must admit how Arsenal is too reliant on him, which is not good for the club in long term, but he must also think to step up. It's a wasteful talent if he still stays there.
That sounds way too pessimistic for me as Arsenal has been on a good way in recent years, but they had some bad luck due to those other teams playing seasons that were out of this world. In the past Arsenal would have won the Premier League title a couple of times if only Liverpool and Manchester City didn't play those spectacular seasons.
Looking back when Ferguson was still the coach of Manchester United, they won a couple of titles with 75 points or so, but those times are over as especially these two clubs Liverpool and Manchester City have taken the number of points to the next level that is now required to have a chance to win the title.
But I think the time might have soon come for Arsenal too and Saka could have been an important part of it.