We really dont. Higuain, Sami are about to leave, perhaps Ramsey as well.
Szczesny (30), Buffon (42), Pinsoglio (30)
Chiellini (36), Bonucci (33), Demiral (22), De Ligt (21), Ruganj (26)
Alex Sandro (29), Danilo (29), Pellegrini (21), De Sciglio (27)
Arthur (24), Bentancur (23), Rabiot (25), Ramsey (29)
Bernardeschi (26), Douglas Costa (30), Cuadrado (32)
Dybala (26), Ronaldo (35)
Bold ones likely to leave as well
Out of eight 30+ olds, 3 are GKs, 2 defenders, a winger (who is leaving probably) and a GOAT striker. Its even less if you look at the starting lineup. Our average age grows significantly due to Buffon, Chiellini and Ronaldo mainly, but i doubt anyone thinks they are a problem somehow
Edit: forgot Kulu whos 20 years old