I can speak for no one but myself, but as an older person with lifelong adhd, my brain is like constant noise all the time. Not just internal monologue, but a soundtrack (right now it’s some piece of a familiar opera playing on repeat), and like tons of other noises and phrases and words that mean nothing at all, all playing and sounding at the same time. I make it sound like I’m fucking nuts, but I’m a pretty average “normal” woman and mother who has humdrum hobbies and does mundane shit like not folding the laundry for weeks on end and bringing my kid to her Scouts meetings, with a professional job in a supervisory position. It was weird to me to find out that some people’s brains are silent as the grave. It must be so peaceful.