I can keep aircraft apart just fine on a normal shift now, calling the moves before they are needed. But when the flow gets heavy and the picture gets tangled, I feel myself reaching the edge of what I can hold. The complex pushes still test everything I have got.
More people experience this than they realize.
You can separate ordinary traffic, but the heavy, tangled flows still push you to your limit.
If this sounds familiar, the Library can help you find the bigger picture.