Card clogs the QB room. I believe he has at least two years left. Depending on how Minchey develops as well as Carr coming (at least at this point) in '24, it doesn't leave much room for Buchner. Assuming Card, that means in '24, the qbs could include Card, Buchner, Minchey, Carr, and Angeli. IMO, I don't think the '23 team is going to be NC-level, so I'd be focused on '24 and beyond.
Of course, Card could leave after one year but we know that Hartman has only one year left.
Given Hartman's overall experience, I would think he could serve as a mentor to the other qbs.