> how big could a potential overlap be between ADHD and autism?

The lack of executive function is overlapping, but this particular post might be more of an ADHD simulator.

The very first "Follow the morning routine" or not is where this veers off my experience of the spectrum.

"Changing plans because of situations internal or external" is hard.

The option should've been "Spend 20 minutes making eggs again, because the yolks weren't the right kind of runny", miss the train, take a cab to work, but tell the driver that you've now got a system for eggs which you didn't have today (yeah, fun fact, the recipe was off because they don't refrigerate them over in France).