Separation of powers is in the process of being disfigured. And once that happens…large swaths of the constitution can be taken down with it. Constitutions inevitably need to be updated and amended. It’s a matter of whether people have the foresight to make necessary changes before it’s too late, and whether they make changes in good faith. If this is not the case, then constitutions eventually fail.
How so?
Can you give examples of failed constitutions that you are basing these statements on?
Germany’s Weimar constitution, for one, failed because not enough of its people cared enough about it to make it work, and quite a few wanted it to fail. It was never repealed, just increasingly ignored.
There has been exactly one significant case involving this amendment: Engblom v. Carey - Wikipedia
It set some rather interesting precedents that may make things difficult for the National Guard in the case of a severe natural disaster that they are called in to help with.