Remember PSG when they tried to buy all the best players just to win the Champions League, they had Messi, Neymar and all the best players in defense and midfield, but it didn't give them anything. So just gathering all the stars in one team is not the best solution, because there must be a coach who can manage all these players, which is not easy. Enrique, by the way, saw that it was difficult for him with Mbappe and in the end he was not against him leaving the club and it worked for PSG. Real Madrid now has many great players, but how Alonso will be able to manage them is not clear yet.
The galacticos concept in Ligue 1 is a copy of several clubs such as Madrid and City, and it's actually quite good, except that PSG overestimated their older players at the time, which meant they were only able to succeed domestically but not in the Champions League.
Now, when we look at Madrid, they are still supported by good resources, and Xabi has been quite good so far. However, it's still early in the season, so it's a bit complicated to say he's already perfect for Madrid. Still, the proof he's shown so far is already noticeable for Madrid, and this is a very good thing in my opinion. With his performance consistently maintained like this, Xabi only needs to keep it up to be considered worthy of replacing Ancelotti as successor.