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Why not, maybe he doesn't really affect the performance of the team or can increase team achievement but sure he can provide benefits in terms of club income, he has many fanatical fans around the world and will provide benefits for his new club as long as the club can give what he wants. There are also rumors that Bayern Munich are interested in him.
if ronaldo moves from MU to chelsea, PSG or bayern then he is no longer worthy of being called a MU legend. many people criticize and support whatever he does, but he must realize that the team that first raised his name was MU. if Ronaldo retires at MU then he deserves a MU legend but if next year's transfer market he moves to another club, then he is not a MU legend.
Actually in this case when saying legendary or obscure it can be something else in everyone's view.
Ronaldo is a great player and we all know that and when he decided to be at Rivals there was obviously a reason there and now the reason he wants to leave too we all know.
Personally, if I were to be in Ronaldo's position when the team's condition always cornered me, then why should I be there just because I want to be and be called a Legend? the club and Ronaldo once gave that to Manchester United.