

I think the key to understanding the context is that GDP is a flow, not any kind of accumulation.
If Person A earns $100,000 this year, gets a 4% raise every year, will they be richer or poorer than Person B who earns $120,000 and gets a 5% raise every year, after 10 years? We have no idea, because we don’t know from the question what their starting wealth was, how much they save or spend, whether the stuff they buy retains its value or appreciates or depreciates, etc.
So Russia can have growing GDP, but can still be running its economy into the ground if the stuff they’re producing is getting destroyed, or has no lasting value.
The amendments were passed/ratified in accordance with the rules within the Constitution itself. So it’s a philosophical distinction in the sense that the Constitution was not scrapped or discarded, and that any modifications came within the permissible framework that the Constitution prescribes.
A much stronger argument than 1993 is that the Constitutional system itself did break during the civil war, and the Union forcibly installed new state governments, through military conquest, to pass the Reconstruction Amendments. Arguably, that military and legal history did step outside of the Constitutional framework in order to preserve the Constitution, but the Supreme Court did rule in Texas v. White that secession itself was impermissible, and that the Guarantee Clause of the Constitution required the federal government to quash an insurrection and reinstate loyal governments.
It’s not a clean legal analysis, and lots of people had to kill or be killed to make it work in principle, but you can still see how it fits within the legal framework.
That being said, applying that standard to other governments shows that plenty of other governments have been in place for longer. In the UK, the relationship between parliament and the crown have evolved over the years, including periods of violence and usurpation and even the occasional regicide, but the basic framework is that truce of competing bases of power agreeing to share that power, or distributing that power (see all the independent nations that have emerged from that British empire), such that the government of the UK can truly be traced back far longer than the government of the United States.