Yeah. I dont have ADHD, but doing many tasks at once is a great way for me to lower my own attention span, make my own attentiveness worst. It is as if doing multiple tasks at once was a great way to put non-ADHD brain into temporary adhd-lite state. (Temporary, because when I stop multitasking, it reverses back over time).

Pre-AI, I worked on projects where people tended to multitask and juggle many tasks at once. They felt productive, they worked a lot and hard and felt they are treated unfairly when outsiders complained about slow speed. Except that, their overall speed was extremely slow, really.