Carvajal is a very important player for Real, it is very difficult to find a worthy replacement for him, and besides, he is not very old, for a defender, 32 years old will still allow him to play for several seasons if desired. At least now he is in very good shape and, together with Rüdiger, clearly forms the basis of the defense. With Modric everything is not so clear, he is definitely an experienced player, but his importance for Real is not so important now, the middle line was left without Kroos, this is of course a significant loss, but Modric is not the one who can cover his absence.
I must say that they built the team like a puzzle, each player fits perfectly into the team's strategy and is not alone, he always has someone who can replace him if he gets hurt.
This means planning a team, I must say that they have done an excellent job over the years. The team is doing very well.