My guess is that any new Gold Standard will be sui generis, and better for it. Let gold will take its place as a third reserve currency, one that cannot be devalued, and one that holds the others to account, but not so dominant that it hitches our collective destinies to the inflationary ups (yes, gold was highly inflationary after the Conquista) and the deflationary downs of global mine supply. That would indeed be a return to a barbarous relic.
Hopefully, it will be nothing like the interwar system. That was a dollar peg that transmitted US deflation to the whole world when the Fed tightened too hard in 1928 and went berserk in 1930.The Telegraph (UK)
A new Gold Standard is being born
(h/t John Zelnicker via email)
Looks like a new global depression may be in the making. Not to mention that the global economy becomes all about "competitiveness" in accumulating gold reserves, aka mercantilism, which historically has led to war.