> Later life diagnoses see people not take the medicine because their condition has become their person and changing that feels like it changes them too much from themselves.

I also see this sentiment frequently but as someone who was diagnosed later in life I couldn't relate to it less. The scattered brain has lead me down some interesting (and fruitful) paths I wouldn't have explored otherwise, but 95% of the time it just distracts me from goals that are actually meaningful to me in the long term, and adds social friction and conflict.

I'd like to see someone study why there's such a stark difference in how people perceive it. Stimulant medication, good sleep, physical activity all help somewhat but they just take it down a notch. There are some aspects where they help a lot and others where they barely make a difference.