How to Trainability Reserve Factor Into Trainability

When an athlete is at a higher level, maybe you don't need to go so far outside of it in certain ways. It will recognize it as a different stimulus. I may be contradicting what I was saying earlier, but but who knows? That's how this learning happens. Exactly. So that brings up something interesting that I haven't thought about, which is: How does trainability or trainability reserve factor into all of this?