Mbappe is a great player and I'm sure Carlo Ancelotti is delighted to have him now. His rotation is quite wide right now. Considering that Arda Güler plays great in the wing position, they have a lot of options and a young average age. We can say that Ancelotti has established the squad for the next 5 years.
Signing prominent young talents will make good ringing next season because Los Blancos squad is most significant among other oppositions. Real Madrid president, Florentino Pérez is one of the top club's president that know exactly how to comprehend the formulation of a club and have delivered good positioning for the club. While on the other hand, Carlo Ancelotti will cook everybody next season, we should get ourselves ready for feast next season because Real Madrid have showed upon themselves to be up and running.
Not only in managing the formula, they are also very good at managing team balance. As we know, they are a team that is always filled with many star players, but in a situation like that, they can still manage everything so that it doesn't become chaotic. Because usually a team filled with many star players will make their situation chaotic due to the ego of a player and so far Real Madrid has succeeded in suppressing this, insisting that its players are not selfish and have to play as a team.
Real Madrid is a team that has a very bright future, because they are filled with many young players and that will be their asset for the future. As you said, they will be more mature in the next 4 to 5 years. This is what other teams should do, because they have to build a foundation to make them strong and not easy to overthrow. Because it is not difficult for Real Madrid to have experienced players and perhaps star players, but they are taking a different approach with their regeneration.