I used to finish one thing, then start the next. Sit down, work it through, move on. That was the whole rhythm.
Now I've got 4+ projects open at once, all in some stage of "almost done." Email workflow getting tuned in one tab. An agent running investment research in another. A new insurance proposal getting picked apart in a third. I'm not really "doing" any of them at a given moment — I'm checking in, nudging each one forward, picking up where I left off, handing it back off. Nothing about it runs in a straight line anymore.
Doesn't come naturally. Most of my career I've been a one-thing-at-a-time guy. But I can feel the rewiring happening — holding more threads at once, knowing where each task sits, what it's waiting on, what the next nudge needs to be. Different muscle than the one I trained for twenty years. If you've got ADHD, I'd bet this feels like relief instead of adjustment — the way you're already wired finally matches how the work wants to get done.
The real shift is the job itself changed underneath me. Less time doing the work, more time managing the systems that do it. Set up the task. Check the output. Route it to the next step. Know when to step in and when to leave it alone. That's most of my day now.