This model has always had the ring of truth to it, to me.
One amusing state you can add when you get old is something like this:
5) Semi-conscious semi-competence
The individual used to be an actual expert in something, but so many years have passed that they are only semi-competent. Yet they retain the manners and affectations of someone who is a true expert. This state tends to confuse and alarm others who are themselves competent and can’t figure out exactly what you are.
One amusing state you can add when you get old is something like this:
5) Semi-conscious semi-competence
The individual used to be an actual expert in something, but so many years have passed that they are only semi-competent. Yet they retain the manners and affectations of someone who is a true expert. This state tends to confuse and alarm others who are themselves competent and can’t figure out exactly what you are.