The regeneration in Madrid squad is done impressively, they don't seem to have a transitional phase remembering they keep winning trophies while doing it. They will surely be lost their leadership in the midfield if Luka Modric chooses to retire either. The La Decima personnel will be gone one by one. I just didn't expect Kroos would retire before Modric remembering Modric is quite older than him.
The young players in Madrid squad are not prospects anymore, they have become the backbone of the team while the senior players are still there. This is the best pattern of regeneration in a big club I have ever seen. Luka Modric is giving full hand on Modric to decide his own future as a respect for his contributions and loyalty. He deserves it all due to his legacy at the club as one of the biggest legend.
This is what we need to pay attention to where the Real Madrid regeneration phase is fully structured, Ancelotti and Florentino Perez are very careful. Real Madrid through a gradual process by not simultaneously in removing its senior players, so that by retiring Kroos, Real Madrid still has Modric who serves as a guide for young players to continue to maintain the club's philosophy. What Real Madrid did was very different from any club when undergoing the transition process that generally overhauled all teams with new ones so that there was no inheritance left to be maintained, be it philosophy and play style that had become the characteristics of the club for several generations. Real Madrid really maintained its tradition until now, in my opinion other clubs must be able to learn from Real Madrid management if you want to regenerate players.
The reputation of Real Madrid helps this regeneration structure, because it seems easy for Madrid to sign any player the want. It's rare for players to reject Real Madrid when they receive the offer that makes Real Madrid doesnt struggle to have this kind of regeneration. The figure of Ancelotti is also a big help in this regeneration, because he is an experienced coach who knows to build a squad and develop young players.
Florentino Perez is a genius at club management, he knows very well how to maintain the club standard by spending budget on the right measure. He nurtures the character of the club becoming stronger than before. It won't surprise me if Real Madrid will still keep winning many trophies in the near future with this kind of philosophy.