French team is not old: only Griezmann (30), Lloris (34), Benzema(33) are veterans.
Pogba and Varane are only 28. Others 6 are in first half of their career. Tchouaméni is the most young at 21.
Lloris will be replaced by Maignan with same level, we will find somebody in attack (Gouiri, Cherki,etc...)