As a fellow ADHDer, can confirm. I must aggressively mono-task to ensure things get done. I have to consciously manage which mode I'm in, "Goal" or "Explore". A simple heuristic I sometimes share with others is: "I can either 'think deeply' or 'do/talk/listen'. Doing both modes at once is possible but at reduced throughput and quality of each. Switching modes is laggy." It's not precisely accurate and there are exceptions but it gets the general idea across.