Except when it's a hyperfocus: then I go 20 steps deep thinking about it all day while leaving a trail of food, papers and other items I was supposed to put somewhere all over the house.
Hyperfocus is still just one thing. It's just that it's all the things about that one thing.
Or it explodes into a mess of related things and you end up researching 20 different ways / things that would combine well with it without accomplishing anything in the end. Except occasionally having people ask: "How do you know so many things?"
Disclaimer: I don't have ADHD according to the doc because I should have had more problems with it in school. More than just getting bullied. She refuses to send me to an institute where they might think I have ADHD, because she doesn't trust their judgement.
Props to my (officially autistic) girlfriend for basically becoming an ADHD psych and helping me structure my life and get things done.
The lighter side of ADHD
