There is something else: in public discourse cause and result regarding the stability of monarchies are usually reversed.

A monarchy does not create stability. Rather, the remaining monarchies owe their continued existence to their stable states.

Quote Originally Posted by Philipvs Vallindervs Calicvla View Post
I think the point being made was that France changes its Constitution when it is threatened, i.e. the Fifth Republic resulted from WWII, rather than it being a case of change always being imposed.
Not to nitpick, but the Vème, the current Republic, was instated owing to the instability of the short-lived post-war IVème Republic, and another lost war, Algeria.

The point remains unaffected by that. As to that: how would it be otherwise? One does not change a Republic on a whim, it takes extraordinary circumstances: revolution, external or internal threat or the like.