I think the portal situation has changed the whole game about depth.
Used to be talented guys were willing to sit and develop and compete for playing time at an elite program, knowing it'd be their turn eventually, and trusting that when it was they would thrive. That was Bama's model, and to some extent Georgia's. (It is also the model that Notre Dame and Michigan have built, although with fewer five-stars).
But now not only can you jump wherever you want, but Georgia and Bama can (and do) have the ability to recruit a comparably talented, and perhaps more experienced, player in over you. So why sit as a redshirt freshman/sophomore when you can go somewhere else and probably start? Why take that chance?
It is distributing the talent, which is good from a competitiveness aspect. But it's also created a situation where everyone is a mercenary on a one-year contract. And that feels pretty chaotic and unsustainable.