And just where would the Unbaptized go?
Limbo. Provided the theory was true.
Limbo was a theory about what happened to unbaptized babies at death. The difficulty the theory attempted to resolve was that, not having committed any personal sin, they could not be damned, yet, being unbaptized, they could not enjoy the Beatific Vision.
No baptized person could go to Limbo because a baptized person in the state of mortal sin would be damned, and a baptized person in the state of grace would eventually enter Heaven.
That’s the question the THEORY of Limbo was intended to answer.
Unbaptized babies, or any unbaptized person who is not guilty of grave sin, would go to Limbo.
Unbaptized adults who were guilty of grave personal sin, would go to Hell.