Just a small correction from my POV. I'm proud to be a socialist. People who are socialists have no problem with other people describing me that way too.
A socialist ER is an oxymoron. In a socialist society people would not and could not retire early. Amassing those types of assets would require a free market system that allows you to save and invest and earn as you choose. In a true socialist society, anything extra you earn could not be saved and instead would be given back for the greater good.
I wonder where the Chinese or North Korean FIRE website is? I think too many people these days think they like socialism without actually understanding how it would affect them and society. There is a reason it never caught on.