"So what are you all going to do? Create a democracy? Anarchy? A dictatorship? A federation?"
No. None of the above. These are mechanisms which make choices when a choice must be made, even if none of the options is broadly acceptable. An appropriate mechanism for, say, governing a country.
Python isn't a country, it's just a programming language, so when there aren't any popular options _doing nothing_ is always the backstop. Does that mean that maybe, eventually, your programming language will shrivel away and become irrelevant? Yeah, it does. But again, not a country, just a programming language, use a different one.
Rough consensus is what you need here. PEP 572 never had rough consensus. Could it have obtained such consensus, someday, perhaps, with more work? Maybe, though I doubt it. But it didn't have that when the PEP was rammed through by the Benevolent Dictator.