So when non-fiat currencies are replaced, you don't think it has to be because the original currency has failed...
When the original something is replaced, that doesn't make that original something go away. We still have horses and buggies, faxes, gold coins, etc. It's just that we took the success of the previous idea and built on top of it. Failed would have been if horse and buggy system failed, we we didn't have any more of them because they all broke, and to fix the situation we started making more of them with the exact same flaws that the first ones broke from.
...but you don't seem to apply this logic to fiat currencies. It seems that by definition, any time they are replaced, it is because they have failed.
That's not what I said.
The main point is that it's like arguing for making 3 legged rectangular tables, having a bunch of them tip over, and then say that three legged tables aren't a failure, because some of them are still standing, and others were replaced with nicer tables. The point is that a three legged table is a failure of an invention; prone to failure; has a failed design. Sure we can keep trying to balance it, but it will still fail as soon as that balance is disturbed.
