What happens to the hairs when you eventually bald?

Whatever Norwood balding pattern a person might happen to develop, does every single hair follicle in those miniaturized/ balding zones eventually miniaturize, stop growing and leave those areas (ie the hairline, crown, etc) totally hairless? Or can there be some hairs in those zones that are DHT resistant and don’t ever fall out? It seems that most balding guys I see still have some hair follicles left in the balding areas that have remained there for a while.

In the balding pattern, the hairs may all fall out (Apoptosis) or some of them may remain.  I have seen Class 7 patients with a complete pattern of balding, yet when I look at the balding area, I often see a few remaining hairs here and there.