Based on today's result, I can assume that Mbappe needs Real Madrid no less than Real Madrid needs him (and maybe more). Still, PSG did not become a top club that can provide the player with "greatness" and a gold note in history. Those results that PSG shows are more likely to harm the player's reputation. Even if PSG achieve victory in the Champions League, the trail of ridiculous weak-willed defeats of previous seasons will not go anywhere. Whereas Real Madrid has the exact opposite aura - it's a club that makes the impossible possible.
Yes, exactly and PSG could not win the Champions League in spite of having a lot of great players in the squad. Moreover, they got beaten by a team where squad consists of older players. It was really a shame for all the great players that played in PSG. PSG just stacked the team but they did not make good enough plans for the players to execute and paid the price for it.