The only way there would be nothing useful to learn is if there was a complete failure due to circumstances outside of the influence of anyone involved, such as an earthquake that halted the plan. Even then a quick note to that effect would be of use.
The only way there would be nothing useful to learn is if there was a complete failure due to circumstances outside of the influence of anyone involved, such as an earthquake that halted the plan. Even then a quick note to that effect would be of use.