Perhaps instead of "we must get better at estimates" we should try "let's become less dependent on fortune telling."
“Anybody who doesn’t change their mind a lot is dramatically underestimating the complexity of the world we live in.” - Jeff Bezos
Any doubt who Amazon supports? Not you: "Amazon removes encryption from its Kindles/phones/tablets" bit.ly/24DNuHS
Software "reuse" as a primary goal is chasing a unicorn. Better: disposable code. Things change, shld be cheap&ez to replace.