I find this distinction to be confusing and not particularly useful. Brace for armchair science!: Although it may present as primarily inattentive, the hyperactive stuff can sneak through subtly. I think it becomes un-learned a lot of the time by adulthood such that the DSM criteria don't _seem_ to apply as strongly but it can very much still be there. At least for me, I think I have 'learned' to be more 'chill', but I still can't help myself from interrupting people a lot of the time.

I use it that way too cause my non-native english tongue struggles to pronounce the H but saying "I don't have ADHD, I have ADD" is really specifically and factually wrong.