I believe that in the future, the medical community will have a better understanding of the many things that can cause ADD, and the diagnosis of "primary ADD" will mostly be replaced by other diagnoses.
I have no idea if most of these will be depression/anxiety diagnoses or not. I was just talking about my own, very limited experience.
> Unfortunately ADD is not just another overmedicalized normal condition.
I actually do think it might be overmedicalized in children. I grew up with many children who would be diagnosed with it today, but weren't at the time. Whether they had it or not, they grew into functioning adults without ADD.