Back in the 1970s there was a joke in the USSR: Even after the worldwide revolution succeeds (i.e. that "socialism in every country" staple of Marxist ideology) we'll have to keep one capitalist country up and running ... just so we know what things cost!.

Fast forward 50 years and we find that we have no capitalist countries in any real sense and we're screwed.

Same goes for "renewable/green energy" - I heard an industry guy the other day saying (close quote): "the whole industry is driven by government mandates and subsidies... nobody knows what anything actually costs" ... we may soon find out!