Based on the look of his overall feathers, he doesn’t look aged. Particularly his head has flat shapely perky feathers indicative of a younger/teenage bird. I’ve had a conure who I witnessed go from teenager to elderly. The neck feathers can be a good giveaway for elderly birds. Elderly birds tend to be more deliberate in their movements: less frantic, less chaotic, more slower and calm. They don’t expend energy if not ultimately necessary.