I'm not sure if that's entirely fair. She did shed light on the nature of the limit (the how): it's not a quantum speed limit, where suddenly more energy input

I'm not sure if that's entirely fair. She did shed light on the nature of the limit (the how): it's not a quantum speed limit, where suddenly more energy input to a body moving at c has no effect (as would probably be a classical interpretation), but rather that the very geometry of our universe constantly revises our notion of time as we move about space, such that the idea of a body moving "faster than c" is a violation of that geometry. I call that pretty insightful, for all that the idea of a universal speed limit could possibly imply.