Complexity is death.

No Rick, your Gantt chart is not working, and it never has!

Just because architecture is supposed to be stable, it does not mean that it should never change.

While it is not unheard of, most sane people would be embarrassed to take an introductory martial arts class and then develop their own “martial art” from it and teach it to unsuspecting students, exposing them to the danger of miscalculating their effectiveness at defending themselves in a critical situation. Yet agile practitioners do this every day ― some do not even feel any sense of shame for calling themselves “agile coaches” after a year of practical experience.