~Snip~
Luka Modrić is still very useful. Him still being in Real Madrid is the prime example of it. Real Madrid lets players go whenever they start dropping in terms of performance. However Real Madrid never let him go even though he is really old at this point. He is 38 years old, and he is still in Real Madrid because he is still playing well.
You know Real Madrid even let Sergio Ramos go because he was not in his prime anymore, but they did not let go of Modrić because they know how valuable he is. And another reason why Real Madrid has not let him go is because they have really not found any good substitute for him, they will have to find a replacement soon to be honest.
It is certain that Luka Modric will not be in the Real Madrid squad for long, the development of younger midfielders makes Luka Modric position even more threatened. Bellingham increasing performance has made him one of the irreplaceable midfielders in Real Madrid main squad.
Federico Valverde, Tchouameni and Camavinga also always perform well when given their trust, Ancelotti only rotates them in several matches by including Toni Kroos or Luka Modric. Modric presence is increasingly marginalized in the Real Madrid squad, now he mostly sits on the bench rather than being trusted to play from the first minute.