Thank you, well put. I think that one of the things that make it hard, is not always knowing exactly what overhead can and what can't be eliminated (and how).

Thank you, well put. I think that one of the things that make it hard, is not always knowing exactly what overhead can and what can't be eliminated (and how). This might be why its more helpful to just call it all waste (lean) to have a lens of optimization on both types.