GMs have to try and build the best teams they can on paper, and projecting production plays into that task heavily. Projecting health is not easy and often domms a GM, and a team, but some players are clearly more likely to get hurt than others.
Age progression and regression is just one aspect of projection outcomes. To me, the age thing is working in the Sox favor, as we have very few key players past prime. Only Chapman and Gray are significantly past prime, and bot have key roles, but the rest of the 24 players on the 26 are all close enough to prime to not expect major regressions. Most of our key players are on the upswing or in peak prime. That might be the best hope we have for 2026.
It's super hard to project players like Mayer, Campbell, Early, Tolle and Anthony. It's not much easier figuring out how well Narvaez, Romy and Rafaela will do. Story's health is a worry, but he, Duran, Abreu, Contreras, Crochet and Gray seem like the only players we can reasonably guess how well they will do.
I get the argument that we lack true major stars, beyond Crochet and maybe Chapman, but teams can win with balance, too.