This is an oldie-but-a-goodie. I made a comment on it (#11) back in 2009, and I have yet to see anyone at all give a decent response to it. My summary: > ...

This is an oldie-but-a-goodie. I made a comment on it (#11) back in 2009, and I have yet to see anyone at all give a decent response to it. My summary: > ... TCO permits the use of black-box abstractions when a property of an object depends on a property of another object; however, TCO is not sufficient to handle the case when a property of an object depends on properties of two other objects. It seems we can conclude from this that black-box abstractions in which a property of an object depends on a property of two (or more) other objects, are generally too resource-intensive to scale well. Doesn't that idea seem like it might be an important one?