I agree that Modrić should stay with Croatia for as long as he wants to be. And I'm sure that Dalić will never kick him out of the national team. Everyone in Croatia knows how much Modrić has given to the national team. I just watched his interview on TV where he said that he will be at disposal to the national team for as long as he thinks the national team needs him.
Nobody is kicking Modric out of the Croatian national team. He is going to play till he wants to step down, Even at his age he still better than a lot midfielders. He is very valuable to the the team.
Modric is not only a good player but he's also a leader. He has led his team to a world cup final, semi final and he's still here leading his team to a nations league final. As old as he is now, he is still needed in that Croatia team. Even Madrid as big and rich as they are cant afford to let Modric leave just yet.