Mats 31 (young for a keeper)
Kounde, Aruajo, FDJ, pedri, Gavi, Balde, Fati, raphinha, Dembele, kessie.
Whatever we think about those players individually are all around 27 or much younger.
When people say build for the future & old players, this has that, just a bit of prospective needs to be added.
And if we play the possible transfer game, we aren't only linked with players in there 30's
Add diaz, roque, promote yamal to that it's even more young players.
Adding/having 2 or 3 players in your starting XI and about 5 in your squad that's in their late 20's or early 30's is actually good for the team.